2.
A resistor of 25 cm length and 4 ohm is stretched to a uniform wire of 50cm length. The resistance now is?
3.
If a wire of resistance 1 Ω is stretched to double its length, then the resistance will become
4.
A suitable unit for expressing the strength of electric field is
5.
The equivalent resistance between P and Q will be
6.
In the circuit shown below, the ammeter A reads 5A and the voltmeter V reads 20V. The correct value of resistance R is
7.
The reciprocal of resistivity of a conductor is
8.
If I is the current though a wire and e is the charge of electron, then the number of electrons in t seconds will given by
9.
An electric charge on a body produces
10.
With decrease in density of the material, the resistance of the conductor
11.
When a body is negatively charged by friction, it means
13.
The conductance can't be expressed in
14.
How many electrons constitute a current of one microampere?
15.
What is the resistance between P and Q?
16.
What is the total resistance across A and B in the circuit shown in fig.
18.
The SI unit of specific resistance is
19.
Read the Question given below
20.
Good conductors have many loosely bound
