2.10 describe how current varies with voltage in wires, resistors, metal filament lamps and diodes, and how this can be investigated experimentally

2.10 describe how current varies with voltage in wires, resistors, metal filament lamps and diodes, and how this can be investigated experimentally

In parallel circuit, current varies with the resistance and voltage. Voltage are same at all branches.

This circuit shows a 10 Ω and 20 Ω resistor connected in parallel to a 6V cell of negligible internal resistance. The p.d. across 10 Ω and 20 Ω resistors is 6V.
I1 = 0.6A
I2 = 0.3 A
As the resistance in I2 is higher, the current is small.
I3 = I1 + I2 (The current in a parallel circuit is shared between the branches depending on the resistance.)