The number of electrons in 1 C charge is :

1. 6.25 x 10¹⁸
2. 6.25 x 10¹⁹
3. 6.25 x 10²⁵
4. 1.6 x 10^-19

The current in a circuit is measured by …………… by connecting it in ……………

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

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

Potential at a point is said to be 1 volt, when …………… of work is done in bringing 1 coulomb charge from infinity to that point.

1. 1 joule
2. 5 joule
3. 10 joule
4. 1 erg