Galva volt-ammeter
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An ammeter is a low resistance galvanometer connected in series to measure current passing through a circuit. It must have very low resistance to not affect the circuit. A voltmeter is a high resistance galvanometer connected in parallel to measure potential difference across a component without drawing much current, so it has very high resistance. A galvanometer can be converted into an ammeter by adding a shunt resistance in parallel to reduce the voltage, or into a voltmeter by adding a high resistance in series to increase the voltage.
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Ammeter and voltmeter
Ammeter is a low resistance galvanometer
It is used to measure the current in a circuit in amperes
Galvanometer can be converted into an ammeter by using a low resistance wire in parallel with the galvanometer
the resistance of the wire depends upon the range of the ammeter
As shunt resistance is small the combined resistance of the galvanometer & the shunt is very low hence the ammeter has much lower resistance than galvanometer
An ideal ammeter has zero resistance
It is the most common instrument used to measure voltage
It measure either AC or DC voltage
It is a measure of the voltage between two points of an electrical current
Galvano Meter
every thing about galvano meter is written on the slide .students are able to learn easily and fluently ....thanks
Ohms law and its application
Ohm's law states that the current through a conductor is directly proportional to the voltage applied, with the constant of proportionality being the resistance of the conductor. Mathematically, this is expressed as I = V/R, where I is current, V is voltage, and R is resistance. Resistance is defined as the opposition to current flow and is measured in Ohms. Ohm's law has many applications in circuit design, electrical safety analysis, AC circuit analysis, and electrical heating devices.
Ammeter
This report discusses the features and applications of ammeters. An ammeter is used to measure electric current through a circuit by connecting it in series. There are several types of ammeters including moving-coil, electrodynamic, moving-iron, hot wire, integrating, and pico ammeters. Ammeters have low resistance and are used to measure current in various applications.
Voltmeter
A voltmeter is an instrument used to measure voltage between two points in a circuit. Analog voltmeters use a moving coil and pointer to display voltage proportionally, while digital voltmeters (DVM) use an analog-to-digital converter to provide a numeric readout. Before DVMs, potentiometers were commonly used to measure voltage by balancing the voltage drop across a known resistor against an unknown voltage. Potentiometers work on the principle that voltage drop is proportional to distance in a uniform wire.
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ppt on electricty class 10
1) The document is a PowerPoint presentation about electricity created by Dheeraj Kumar Meena for class 10.
2) It covers topics like electric current and circuits, electrical potential and potential difference, Ohm's law, and types of electric circuits.
3) Ohm's law explains the relationship between voltage, current, and resistance and states that at constant temperature, current is directly proportional to potential difference.
Recommended
Ammeter and voltmeter
Ammeter is a low resistance galvanometer
It is used to measure the current in a circuit in amperes
Galvanometer can be converted into an ammeter by using a low resistance wire in parallel with the galvanometer
the resistance of the wire depends upon the range of the ammeter
As shunt resistance is small the combined resistance of the galvanometer & the shunt is very low hence the ammeter has much lower resistance than galvanometer
An ideal ammeter has zero resistance
It is the most common instrument used to measure voltage
It measure either AC or DC voltage
It is a measure of the voltage between two points of an electrical current
Galvano Meter
every thing about galvano meter is written on the slide .students are able to learn easily and fluently ....thanks
Ohms law and its application
Ohm's law states that the current through a conductor is directly proportional to the voltage applied, with the constant of proportionality being the resistance of the conductor. Mathematically, this is expressed as I = V/R, where I is current, V is voltage, and R is resistance. Resistance is defined as the opposition to current flow and is measured in Ohms. Ohm's law has many applications in circuit design, electrical safety analysis, AC circuit analysis, and electrical heating devices.
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This report discusses the features and applications of ammeters. An ammeter is used to measure electric current through a circuit by connecting it in series. There are several types of ammeters including moving-coil, electrodynamic, moving-iron, hot wire, integrating, and pico ammeters. Ammeters have low resistance and are used to measure current in various applications.
Voltmeter
A voltmeter is an instrument used to measure voltage between two points in a circuit. Analog voltmeters use a moving coil and pointer to display voltage proportionally, while digital voltmeters (DVM) use an analog-to-digital converter to provide a numeric readout. Before DVMs, potentiometers were commonly used to measure voltage by balancing the voltage drop across a known resistor against an unknown voltage. Potentiometers work on the principle that voltage drop is proportional to distance in a uniform wire.
Capacitor Presentation
A capacitor is a device that stores electric charge between two conductive plates separated by an insulator. When a voltage is applied across the plates, charges of opposite polarity accumulate on each plate. The amount of charge stored depends on the capacitor's capacitance, which is determined by the size, number, and distance between plates as well as the dielectric material between the plates. Capacitors are used in electrical circuits for functions like energy storage, voltage regulation, timing, and filtering. They can be connected in parallel to increase total capacitance or in series to decrease it. Common applications include power supplies, audio equipment, and sensors.
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2) It covers topics like electric current and circuits, electrical potential and potential difference, Ohm's law, and types of electric circuits.
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This document discusses different types of ammeters. It begins with an introduction on what an ammeter is and provides a brief history on their development. It then outlines the main types of ammeters which include moving-coil ammeters, electrodynamic ammeters, moving-iron ammeters, hot-wire ammeters, digital ammeters, and integrating ammeters. Each type is then described in 1-2 sentences on their basic operating mechanism.
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This document discusses converting a galvanometer into a voltmeter or ammeter. It explains that a galvanometer is connected in series and measures current magnitude, while an ammeter is a low-resistance galvanometer also connected in series to measure current. A voltmeter is a high-resistance galvanometer connected in parallel to measure potential difference. The document states that a galvanometer can be converted into an ammeter by connecting a low resistance shunt parallel to reduce total resistance. And it can be converted into a voltmeter by connecting a high resistance in series to increase total resistance. A numeric problem demonstrates calculating the resistances needed to convert a 12Ω galvanometer into a 0-18V
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1. A transformer transfers electrical energy from one circuit to another through electromagnetic induction without changing frequency.
2. Transformers have two windings, the primary and secondary, wound around a magnetic core. This allows a changing magnetic field in the primary to induce voltage in the secondary.
3. Transformers come in different types for various applications, including step-up transformers which increase voltage and step-down transformers which decrease voltage from a main supply. Larger power transformers are used to transmit electricity over long distances.
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The document discusses transformers, including their construction, principle of operation, types (step-up and step-down), applications, and history. A transformer is a device that changes alternating current voltages through inductive coupling between two coils. It consists of a primary coil, secondary coil, and iron core. The principle is based on Faraday's law of induction. Transformers are used to increase or decrease voltages for power transmission or electronic devices and were an important development in the history of electricity.
1 Conversion of Galvanometer into Ammeter and Voltmeter 2 Differences between...
1 Conversion of Galvanometer into Ammeter and Voltmeter
2 Differences between Ammeter and Voltmeter
Dc voltmeter
A voltmeter is an electrical device used to measure potential difference between two points in a circuit. It is always connected in parallel across the circuit. A voltmeter consists of a high resistance galvanometer connected in series with a high resistance to measure voltage in volts. The resistance value depends on the voltmeter's range, and an ideal voltmeter has infinite resistance to not affect the circuit being measured.
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This document discusses magnetic fields produced by solenoids. It defines a solenoid as a coil of wire that produces a strong magnetic field inside its core. The magnetic field strength inside a solenoid, B, is directly proportional to the number of turns N, and the current I, as described by the equation B=μNI. It also provides an example of writing a MATLAB program to plot the magnetic field in the x-z plane for a given solenoid geometry and current.
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The document describes the construction, working, and usage of a permanent magnet moving coil (PMMC) meter. A PMMC meter works based on the D'Arsonval principle where a current carrying coil experiences a force when placed in a magnetic field, causing it to move. When built according to the instructions, the PMMC meter can be used to measure current by connecting it in series in a circuit. The meter has advantages like high accuracy but is only suitable for DC measurements.
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1) Current electricity deals with the motion of charges in conductors like electrons. Electric current is defined as the charge flowing through any cross-section of a conductor per second, with the standard unit being 1 ampere.
2) Materials can be classified as conductors, insulators, or semiconductors based on their conductivity. Conductors have high conductivity while insulators have very low conductivity.
3) Resistance is a measure of the opposition to current flow in a conductor. It is measured in ohms and depends on factors like the material and dimensions of the conductor.
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Photodiodes are semiconductor light sensors that generate a current or voltage when illuminated by light. They work by absorbing photons which creates electron-hole pairs, generating a photocurrent. Photodiodes can operate in photovoltaic, reverse bias, or forward bias modes. They are made from materials like silicon, germanium, or indium gallium arsenide and constructed with a PN or PIN junction. Common applications include use in consumer electronics, light sensors, medical devices, and scientific instruments.
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2. History of transformer
3. Principle
4. Construction and Working
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1. Conductors are materials that allow the flow of electric charges through them. Most metals are good conductors due to their crystalline structure and delocalized electrons.
2. In metallic solids, the atomic orbitals overlap to form energy bands. In conductors, the valence band is partially filled or overlaps with the empty conduction band, allowing electrons to move freely through the material.
3. Common good conductors include copper, silver, and gold. Conductivity decreases with increasing temperature as atomic vibrations interfere with electron flow.
4. Some materials become superconductors below a critical temperature, allowing infinite conductivity and perfect diamagnetism due to the Meissner effect. This occurs due to
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This document discusses different types of ammeters. It begins with an introduction on what an ammeter is and provides a brief history on their development. It then outlines the main types of ammeters which include moving-coil ammeters, electrodynamic ammeters, moving-iron ammeters, hot-wire ammeters, digital ammeters, and integrating ammeters. Each type is then described in 1-2 sentences on their basic operating mechanism.
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The document provides an introduction to galvanometers, which are instruments used to detect electric currents through circuits. It discusses how galvanometers work by converting electrical energy into mechanical energy when a current passes through a coil in a magnetic field, causing the coil to rotate based on the strength of the current. The document also outlines the basic construction of galvanometers, which use a permanent magnet and moving coil, and how they work by reaching an equilibrium when the restoring torque from the coil's suspension strip balances the magnetic deflecting torque. Finally, it states that while galvanometers can detect small currents, their primary purpose is detection rather than precise current measurement.
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Resistance is defined as the ratio of voltage to current in a circuit. Ohm's law states that voltage is directly proportional to current and resistance. The resistance of an object depends on the material it is made of, with insulators having high resistance and conductors having low resistance. Resistance also depends on size and shape, with resistance increasing as length increases or cross-sectional area decreases. Resistance is measured in ohms and resistance can be calculated using the resistance equation.
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This document discusses converting a galvanometer into a voltmeter or ammeter. It explains that a galvanometer is connected in series and measures current magnitude, while an ammeter is a low-resistance galvanometer also connected in series to measure current. A voltmeter is a high-resistance galvanometer connected in parallel to measure potential difference. The document states that a galvanometer can be converted into an ammeter by connecting a low resistance shunt parallel to reduce total resistance. And it can be converted into a voltmeter by connecting a high resistance in series to increase total resistance. A numeric problem demonstrates calculating the resistances needed to convert a 12Ω galvanometer into a 0-18V
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3. Transformers come in different types for various applications, including step-up transformers which increase voltage and step-down transformers which decrease voltage from a main supply. Larger power transformers are used to transmit electricity over long distances.
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ammeter and voltmeter presentation. For college pdf
An ammeter measures electric current and is connected in series in a circuit. A voltmeter measures potential difference and is connected in parallel. Both use a permanent magnet and moving coil to function. An ammeter has a low resistance shunt to minimize impact on the circuit. A voltmeter has a high resistance series element to increase the voltage drop across it. Multimeters can measure current, voltage and resistance using different circuit configurations of the moving coil instrument. Measurement errors include friction and magnetic field decay over time.
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Notes
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The open circuit test involves connecting the primary to a voltage source with the secondary open. Measurements are taken to determine core losses.
The short circuit test involves connecting the secondary to a voltage source through an ammeter, with the primary short circuited. This test determines series parameters.
Load tests are done by energizing the transformer at rated voltage and varying the secondary load. Readings are taken at each load level to determine efficiency and voltage regulation under load.
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The document summarizes the key components and functions of a 33/11kV substation in Indiranagar, Lucknow, Uttar Pradesh, India. It contains 10 sections that describe the introduction, transformer, isolator, circuit breaker, relay, lightning arrester, current/potential transformers, capacitor bank, and conclusion. The substation receives power from two 33kV transmission lines and steps it down through 3 parallel 10MVA transformers for distribution through 11 feeders to various areas in Indiranagar. It contains critical equipment like switchgear, isolators, circuit breakers, relays, and instrument transformers to safely transmit and distribute power. Capacitor banks are also included to improve the power
Answer 1 sir teehseen
The document provides information about various types of instruments used to measure electrical quantities like current, voltage, power, and temperature. It discusses the definitions, principles, constructions, and workings of galvanometers, voltmeters, ammeters, wattmeters, dynamometers, energy meters, and thermoelectric instruments. The key points are:
- Galvanometers measure small currents using the magnetic torque produced when a current-carrying coil is placed in a magnetic field.
- Instruments can be converted to voltmeters and ammeters by connecting galvanometers in series with high resistances or in parallel with low resistances, respectively.
- Hot-wire instruments use expansion of a wire due to heating by current
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Galva volt-ammeter
- 2. a device used to find direction of current and its magnitude it has small resistance and is connected in series.
- 3. It is a low resistance galvanometer used to measure current in a circuit. The current to be measured must pass through it, hence, it is connected in series combination.
- 4. NOTE: it is connected in series combination an ideal ammeter should have zero resistance.
- 5. It is a high resistance galvanometer, used to measure potential difference between two points. It is connected across the component’s ends potential difference across which is to be measured. Hence, it is in parallel to that component.
- 6. NOTE: it is in parallel to the component an ideal voltmeter must have infinite resistance.
- 7. Galvanometer can be converted into ammeter by shunting it with a very small resistance.
- 8. NOTE: Potential difference across the galvanometer and shunt resistance are equal.
- 9. Galvanometer can be converted into voltmeter by connecting it with a very high resistance.
- 10. NOTE: Potential difference across the given load resistance is the sum of p.d across galvanometer and p.d. across the high resistance.
- 11. THANK YOU FOR LISTENING…