1.
If radius of a metallic wire becomes n times, its resistance becomes
2.
If a wire of resistance 1 2 is stretched to double its length, then the resistance will become
3.
If length of a metallic wire becomes n times, its resistance becomes
4.
What happens to its resistivity when some impurity is added in a conductor?
5.
A conductor behaves as superconductor
6.
Read the Question given below
7.
A rectangular conducting cube (resistivity p) has dimensions l × b × h When current is passed through the length side, the resistance offered by the cube is
8.
A resistor of 25 cm length and 4 ohm is stretched to a uniform wire of 50 cm length. The resistance now is
9.
The equivalent resistance between P and Q will be
11.
How will the reading in the ammeter A be affected if another identical bulb Q is connected in parallel to P. The voltage in the mains is maintained at a constant value.
12.
Read the Question given below
13.
What is the current (I) in the circuit?
14.
If an equilateral triangle is made of a uniform wire of resistance R. the equivalent resistance between the ends of sides is
15.
Which switch in the circuit when closed will produce short-circuiting?
16.
In the circuit shown below, the ammeter A reads 5 A and the voltmeter V reads 20 V. The correct value of resistance R is
17.
Read the Question given below
18.
What is the resistance between A and B in the following circuit
19.
If area of cross-section of a metallic wire be comes n times, its resistance becomes
20.
The effective resistance of a circuit containing resistances in parallel is
