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Current electricity
by sarita kuan
# Current electricity

## Potential difference

### The energy possessed by 1 unit of
charge at any one point in a
circuit.

## E.M.F (electromotive force)

### The work done used to drive one
unit of charge round a complete
circuit.

## Current

### The time taken to drive one unit
of charge round a complete
circuit

## Voltage

## Resistance

### Ohm's law

### R is inversely proportional to area

### R is directly proportional to length

### P=RA/L

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V=W/Q

I=Q/T

R=V/I (constant)