Physics Quiz_ CLASS 10

Unit of resistance is:

• (a) Ohm

• (b) Ohm/cm

• (c) Ohm-cm

• (d) Volt

Charge on one electron is:

• (a) -9.1 × 10^-19 C

• (b) -1.6 × 10^-19 C

• (c) +9.1 × 10^-19 C

• (d) +1.6 × 10^-19 C

Ohm’s law is true for:

• (a) only metallic conductors at low temperature

• (b) only non-metallic conductors at low temperature

• (c) only semi-conductors at low temperature

• (d) all of these.

The current flow in conductor is due to:

• (a) free electrons

• (b) protons

• (c) ions

• (d) neutrons

The current of 1.5 A flows through a wire of resistance 1.5 ohm. The potential difference across the wire is:

• (a) 22.5 Volt

• (b) 2.25 Volt

• (c) 1.0 Volt

• (d) 0.225 Volt

The value of current during short circuit:

• (a) is zero

• (b) is very high

• (c) does not change

• (d) changes continuously

A current of 1.0 ampere is flowing in a conductor. The number of electrons passing per second will be:

• (a) 6.25

• (b) 6.25 × 10^-16

• (c) 6.25 × 10^18

• (d) 1