1.
If length of a metallic wire becomes n times, its resistance becomes
2.
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
3.
A resistor of 25 cm length and 4 ohm is stretched to a uniform wire of 50 cm length. The resistance now is
4.
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.
5.
Read the Question given below
6.
If area of cross-section of a metallic wire be comes n times, its resistance becomes
7.
If an equilateral triangle is made of a uniform wire of resistance R. the equivalent resistance between the ends of sides is
8.
What is the resistance between A and B in the following circuit
9.
Which switch in the circuit when closed will produce short-circuiting?
11.
The effective resistance of a circuit containing resistances in parallel is
12.
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
13.
Read the Question given below
14.
Read the Question given below
15.
The equivalent resistance between P and Q will be
16.
If a wire of resistance 1 2 is stretched to double its length, then the resistance will become
17.
What is the current (I) in the circuit?
18.
What happens to its resistivity when some impurity is added in a conductor?
19.
A conductor behaves as superconductor
20.
If radius of a metallic wire becomes n times, its resistance becomes