If n electrons pass through a cross-section of a conductor in time t, then current in conductor is :

1. I = $\dfrac{ne}{t}$
2. I = $net$
3. I = $\dfrac{nt}{e}$
4. I = $\dfrac{n}{et}$

If W joule of work is done in bringing a test charge Q coulomb from infinity to the point P, then electric potential V at point P is :

1. V = WQ
2. V = Q/W
3. V = W/Q
4. none of the above

The potential difference between two points in an electric circuit is measured by a …………… which is connected in …………… with the circuit.

1. voltmeter, series
2. voltmeter, parallel
3. ammeter, series
4. ammeter, parallel

The obstruction offered to the flow of current by a wire is called :

1. current
2. potential
3. resistance
4. charge