To Verify Ohm's Law

1. Ohm’s law is true for

a) Metallic conductors at low temperature
b) Metallic conductors at high temperature
c) For electrolytes, when current passes through them
d) For diode when current flows

2. An example of non-ohmic resistance is

a) Diode
b) Tungsten wire
c) Carbon resistance
d) Copper wire

3.A potential difference of 10 V is applied across a conductor whose resistance is 2.5 ohm. What is the value of current flowing through it?-

a) 4 amperes
b) 2 amperes
c) 6 amperes
d) 10 amperes

4. When the length of the conductor is doubled and the area of cross-section remains the same then its resistance

a) Remains the same
b) Will be doubled
c) Will become half
d) Will increase by four times

5. An open circuit has no current flowing through it.

a) True
b) False