Home
Class 12
PHYSICS
In meter bridge experiment AB is wire of...

In meter bridge experiment AB is wire of 1m of uniform cross section area. If resistivity of AB wire is `rho,` null point is obtained at a point `'l_(2)'` distance from A. If resistivity is `2rho` null point will be ‘`'l_(2)'` from A and if left half of the wire has resistivity and right half has resistivity then null point is at `'l_(3)'`. Choose the correct statement:

Text Solution

Verified by Experts

The correct Answer is:
B
if resistivity is uniform then position of null point does not depend on its value so `l_(1)=l_(2)`.
If left half has resistivity `rho` and right half has resistivity `2rho` then to get some ratio null point has to be shifted towards right `(l_(3)gtl_(2))`.
Promotional Banner

Similar Questions

Explore conceptually related problems

For the accurate measurement of resistance by metre bridge, the null point should be obtained

In a meter bridge experiment the ratio of left gap resistance to right gap resistance is 2:3 the balance point from is

In the metre-bridge experiment with uknown resistance X in the left gap and a known resistance of 60Omega in the right gap, null point is obtained at l cm from left. If the unknown resistance X is shunted by an equal resistance, what should be the value of the known resistance in the right gap in order to get the null point at the same position?.

In a meter-bridge experiment with a resistance R_(1) in left gap and a resistance X in a right gap. null point is obtained at 40 cm from the left emf. With a resistance R_(2) in the left gap, the null point is obtainned at 50 cm from left hand. Find the position of the left gap is containing R_(1) and R_(2) (i) in series and (ii) in parallel.

In a meter bridge experiment, null point is obtained at 20 cm from one end of the wire when resistance X is balanced against another resistance Y . If X lt Y , then the new position of the null point from the same end, if one decides to balance a resistance of 4 X against Y will be at.

In a meter bridge experiment null point is obtained at 20 cm. from one end of the wire when resistance X is balanced against another resistance Y. If XltY, then where will be the new position of the null point from the same end, if one deicdes to balance a resistance of 4 X against Y

In a meter bridge experiment two unknown resistance X and y are connected to left and right gaps of a meter bridge and the balancing point is obtained at 20 cm from right (XgtY) the new position of the null point from left if one decides balance a resistance of 4 X against Y.

In a meter bridge, the null point is found at a distance of 40 cm from A. If a resistance of 12 Omega in connected in parallel with S the null point occurs at 50.0 cm from A Determine the value of R and S

In a meter bridge the null point is obtained at the middle point of the wire. If in one gap the resistance is 10 Omega , then the value of resistance in the other gap is :–