Question

A metrebridge cannot be used to determine ?

Answer 1

Answer:

The meter bridge is sensitive when the resistance of all four arms of the bridge are off the same order. It is so far moderate resistance only the meter bridge becomes insensitive for too high or too low values of resistances.

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Answer 2

Your question was incomplete. Please check below the full content.

A meter bridge cannot be used to determine ____

A. resistance of a wire

B. specific resistance

C. conductivity

D. e.m.f of a cell​

Answer:

The correct option is D. emf of a cell

Explanation:

• A meter bridge can be used to determine the resistance of a wire and in turn the specific resistance, conductivity and specific resistance of the material
• A metre bridge consists of two thick metallic strips bent at right angles, two gaps across which resistors are to be connected, and a wire with a uniform cross-sectional area and length stretched tight and clamped between them.
• The clamped end ends of the wire are linked to a cell by a key. The metallic strip located in the middle of the two spaces is where one end of a galvanometer is attached.
• The jockey, which travels along the wire to form the electrical connection, is attached to the other end of the galvanometer.
• R connects across one of the gaps and has an unknown resistance. We link a standard known resistance S across the other gap.

We cannot determine the emf of a cell using a meter bridge.

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