Question

What would you conclude if galvanometer needle keeps shaking
in your experimental set up?

Answer 1

Explanation:

If the value of R is increased, the current through the wire will decrease which in turn decreases the potential difference across AB, and hence potential gradient (k) across AB decreases. Thus, with the increase of l, which will result in increase in balance length

Answer 2

Answer:

If the Galvanometer needle keeps shaking in an experiment then we can conclude either connections may be loose or emf of the cell may be varying.

Explanation:

The galvanometer always needs to show a deflection opposite to the side the jockey is touched. This confirms that the circuit is connected correctly.

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