Steady current
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A steady current is a type of direct current that maintains a constant intensity over time. There are two types of electric currents caused by the motion of free charges: conduction current, which flows through a conductor due to an applied potential difference, and convection current, which occurs when heat is transferred from one place to another in the Earth's geosphere, atmosphere, and hydrosphere. The key difference between conduction and convection current is that conduction current involves the movement of charge particles through a conductor while convection current involves their movement through a gaseous medium, and conduction current obeys Ohm's law while convection current does not.
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This document discusses several key concepts in electricity including:
1. Electric current is defined as the rate of flow of electric charge through a surface. The SI unit for current is the ampere.
2. Ohm's law states that the current through a conductor is directly proportional to the voltage applied. It is defined by the equation I = V/R where I is current, V is voltage, and R is resistance.
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This document summarizes key concepts in electricity and electromagnetism. It discusses static electricity, conductors and insulators, magnetic fields, direct and alternating current, current measurement using galvanometers, electromagnetic flowmeters, heat production from current flow, units like the volt and ampere, electrical burns, diathermy, capacitance and electric charge, and defibrillators. Key points include how rubbing amber produces static electricity, how conductors allow electron flow, how magnetic fields are produced by current flow and changed by ferromagnetic materials, and how alternating current oscillates direction while direct current flows one way. Measurement devices like galvanometers and flowmeters rely on the interaction of electric currents and magnetic fields. Safety concepts regarding
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This document discusses various electrical concepts including static electricity, conductors and insulators, magnetic fields, direct and alternating current, capacitance, resistance, impedance, and skin impedance. Some key points:
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- A changing magnetic field induces electric current in a conductor. Electromagnets have stronger magnetic fields than normal magnets.
- Direct current flows one way, alternating current oscillates. The volt measures potential difference based on power and current.
- Capacitors store electric charge between conducting plates
Applications of electricity
The document provides an overview of key concepts in electricity and magnetism including:
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2) What charge is and that protons and electrons have equal but opposite charges.
3) Conductors, insulators, semiconductors, and their properties related to charge flow.
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5) Electromagnetic induction, transformers, alternating current, and direct current.
V_C_ R.ppt
This document discusses key electrical concepts including resistivity, resistance, conductance, voltage, current, and charge. It defines these terms, provides their mathematical relationships, and gives examples of common material properties and electrical components. The summary concludes by noting that while the text discusses electron flow, this course will use the conventional definition of current.
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1. Electric charges can be positive or negative, and electric forces cause like charges to repel and unlike charges to attract according to Coulomb's Law.
2. Atoms contain protons with a positive charge and electrons with a negative charge; objects are neutral when they contain equal numbers of protons and electrons.
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4. Capacitors are used to store electric charge and consist of conductive plates separated by an insulator; the amount
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This document discusses electric current and its characteristics. It defines electric current as the net flow of electric charge through an area per unit time. It also defines current density as the amount of electric charge flowing per unit area of a conductor. The document explains that electric current occurs when an electric field is established in a conductor, causing electric charges to drift through the material. It also discusses resistivity, resistance, and how both increase with temperature. Finally, it defines electromotive force and distinguishes it from terminal voltage.
1 basic electronics
1) Sound is transmitted through vibrations in air that can be converted to electrical signals through transducers like microphones. Recording equipment uses analog and digital electronics to store and manipulate these signals.
2) Analog electronics represent sound as continuously varying electrical signals, while digital uses discrete measurements. Components like resistors, capacitors, and inductors can store and direct current based on properties like resistance and reactance.
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electricity class 10th .pdf
Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it, provided all physical conditions and temperatures remain constant. Resistance is a measure of opposition to current flow and depends on the material, length, and cross-sectional area of the conductor. The heating effect of electric current is used in various appliances like electric bulbs, heaters, and irons where a conductor is heated by the passage of current. Electric power is defined as the rate at which electrical energy is transferred by a circuit and is measured in watts.
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This document discusses electrolytic solutions and electrochemistry. It begins by defining electrochemistry as the study of chemical reactions involving electron transfer between an electrode and electrolyte. It then discusses different types of solutions, distinguishing between electrolytic and non-electrolytic solutions. Electrolytic solutions contain ions and are electrically conductive. The document also discusses the differences between electronic and electrolytic conductors, and how conductivity is affected by various factors like temperature, concentration, and ion size. It introduces concepts like equivalent conductance, molar conductance, activity, and activity coefficients. In summary, the document provides an overview of key concepts relating to electrolytic solutions and electrochemistry.
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- 2. Steady Current A constant current (steady current, time-independent current, stationary current) is a type of Direct Current (DC) that does not change its intensity with time. There are two types of electric current caused by the motion of free charges. 1.Coduction current 2. Convection current
- 3. Classification of Steady Current Conduction current: Conduction current is the electric current that flows through a conductor because of an applied potential difference. Convection Current: Convection currents occur in the Earth's geosphere, atmosphere and hydrosphere when heat is transferred from one place to another. Heat energy moves from hot places to cold places during convection.
- 4. Difference Between convection current and convection current Conduction current Convection current 1. Due to movement charge particle in a conduction. 1. Due to movement charge particle in a gaseous medium. 2. It obeys Ohms law. 2. It doesn’t maintain Ohms law.
- 5. Thank You