Discussion on Electricity by Anjana Mishra

1. POWER POINT PRESENTATION
ON
BASIC SCIENCE
BY
ANJANA MISHRA

2. ELECTRICITY
Objective:
• To know the relation between voltage, current and resistance
• Problem solving using ohms law

3. Electric Current:
• flow of charges is known as current
• It is measure in ampere
One ampere of current represents one coulomb of electrical charge
moving past a specific point in one second.
Voltage:
• it is also called electromotive force.
• It is the potential difference between two points in an electric field.
• It is denoted by a symbol V.
• Its unit is volts.(one volt drive one coulomb)

4. Resistance:
• It is defined as the measure of difficulty to pass the current
through the conductor.
OR
The measure of opposition to flow the current. Its inverse
quantity is known as electrical conductance.
Its SI unit is ohm and unit of conductance is Siemens.

5. Ohm's law:
In 1828, George Simon Ohm, a German physicist derived a relation V =
IR
At constant temperature ,current through a conductor between two
points is directly proportional to the potential difference between two
points.
V = IR where V is the potential difference is the current in the conductor
and R is the resistance of the conductor.
Ohm s law can be used to verify:
• Static values of circuit components
• Current level
• Voltage supply
• Voltage drop
When the temperature of a metal increases, resistance decreases. Good
conductors possess non-zero electrical resistances.