Current electricity

Coulomb C

Resistivity ρ

Ampere A

Potential difference V

This instrument measures current. It should be connected in parallel.

This instrument measures current. It should be connected in series.

This instrument measures potential difference. It should be connected in parallel.

This instrument measures electromotive force. It should be connected in series.

galvanometer

ammeter

voltmeter

potentiometer

series

parallel

remains same

4 times

2 times

10 times

Resistors connected in alternate

Resistors connected in series

Resistors connected in parallel

Resistors connected in combination

Conductors

Insulators

Ametre

Voltmetre

increases.

decreases.

does not change.

increases for a time and then starts to decrease.

The current is exactly the same at points A, B, C, and D.

The current at A is greater than the current at B, which is equal to the current at C, which is greater than the current at D.

The current at A is greater than the current at B, which is greater than the current at C, which is greater than the current at D.

The potential at D is equal to the potential at C.

The equivalent resistance is equal to that of any one of the resistors.

The equivalent resistance is equal to average of the four resistances.

The equivalent resistance is less than that of the smallest resistor.

The equivalent resistance is more than the largest resistance.

12 V

21 V

4/3 V

3/4 V

3 Amps

192 Amps

2 Amps

4 Amps

Current

Power

Ohms

Watts

Ω (Ohms)

V (Volts)

A (Amps)

W (Watts)