Question

in the circuit diagram given below (i) Mark the polarity at the terminals of [4]
ammeter and indicate clearly the direction of flow of current in the circuit when
the circuit is complete (ii) Name and state the purpose of Rh in the circuit.
cell
f key​

Answer 1

Explanation:

1rheostat is used to change the resistance.

2 key helps to close and open the circuit.

3cell helps to maintain potential difference.

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