Home
Class 10
PHYSICS
In the given circuit, connect a nichrome...

In the given circuit, connect a nichrome wire of Length 'L' between points X and Y and note the ammeter reading.

When this experiment in repeated by inserting another nichrome wire of the same thickness but twice the length (2L), What changes are observed in the ammeter reading?

A

Ammeter reading will increase

B

Ammeter reading will decrease

C

Will show double the increase

D

No change in ammeter reading

Text Solution

Verified by Experts

The correct Answer is:
A
The ammeter reading will decrease (become half). This is because with the increase in length, resistance of the circuit increase, hence current decreases.
Promotional Banner

Similar Questions

Explore conceptually related problems

A force F is applied on the wire of radius r and length L and change in the length of wire is l . If the same force F is applied on the wire of the same material and radius 2r and length 2L. Then the change in length of the other wire is

The resistance of a wire of uniform diameter d and length L is R . The resistance of another wire of the same material but diameter 2d and length 4L will be

The length of a metal wire is l when the tension is F and x l when the tension si y F. Then the natural length of the wire is

A wire of length L and radius r is clamped at one end. On stretching the other end of the wire with a force F, the increase in its length is 1. If another wire of same material but of length 2L and radius 2r is stretched with a force 2F, the increase in its leagth will be

One end of a horizontal thick copper wire of length 2L and radius 2R is weded to an end of another horizontal thin copper wire of length L and radius R .When the arrangement is stretched by applying forces at two ends , the ratio of the elongation in the thin wire to that in the thick wire is

One end of a horizontal thick copper wire of length 2L and radius 2R is welded to an end fo another horizontal thin copper wire of lenth L and radius R. When the arrangement is stretched by applying forces at two ends, the ratio of the elongation in the thin wire to that in the thick wire is