In a metre bridge experiment to determine unknown resistance of a coil, how is position of the null point affected if:
(i) Galvanometer and cell are interchanged?
(ii) Known and unknown resistances are interchanged?

In the metre bridge, the balancing length AB = 20 cm. The unknown resistance X is equal to

(i) In a metre bridge, the balance point is found to be at 39.5 cm from the end A, when the resistor Y is of 12.5 Omega . Determine the resistance of X. Made of thick copper strips? (ii). Determine the balance point of the bridge above if X and Y are interchanged. (iii). what happens if the galvanometer and cell are interchanged at the balance point of the bridge ? Would the galvanometer show any current?

In the metre bridge, the balancing length AB =l=20 cm. The unknown resistance X is equal to

In a meter bridge experment, the value of unknown resistance is 2Omega . To get tehbalancing point at 40 cm distance form the same end, the resistance in the resistance box will be :

In a metre bridge when the resistance in the left gap is 2Omega and an unknown resistance in the right gap, the balance point is obtained at 40 cm from the zero end. On shunting the unknown resistance with 2Omega find the shift of the balance point on the bridge wire.

Two students ‘X’ and ‘Y’ perform an experiment on potentiometer separately using the circuit given: Keeping other parameters unchanged, how will the position of the null point be affected it (i) X’ increases the value of resistance R in the set-up by keeping the key K_1 closed and the key K_2 open? (ii) Y’ decreases the value of resistance S in the set-up, while the key K_2 remain open and the key K_1 closed? Justify.

In an experiment to determine an unknown resistance, a 100 cm long resistance wire is used. The unknown resistance is kept in the left gap and a known resistance is put into the right gap. The scale to measure length has a least count 1 mm. The null point B is obtained at 40.0 cm from the left gap. We shell determine the percentage error in the computation of unknown resistance.

In a metre bridge, the length of the wire is 100 cm. At what position will the balance point be obtained if the two resistances are in the ratio 2 : 3?

A student performs meter bridge experiment to determine specific resistance of a conducting wire of length 10cm and diameter 1mm. When a standard 6 Omega resistance is connected on left gap and the given conducting wire is connected on the right gap, the balance points obtained for 60cm length of the meter bridge wire. The specific resistance in Omega-m for material of the given wire is:

The Wheatstone's bridge shown in the Fig. A2.5 is balanced. If the positions of the cell C and the galvanometer F are now interchanged, G will show zero deflection