Question

- Draw a circuit diagram of an electric circuit containing a cell, a key, an ammeter, a resistor of
2 ohms in series with a combination of two resistors (4 ohms each) in parallel and a voltmeter
across the parallel combination.​

Answer 1

Total resistance for parallel combination of 4Ω resistors can be calculated as follows :

R

1

=

4

1

+

4

1

=

2

1

or, R=2Ω

Thus resistance of parallel combination is equal to resistance of resistors in series . So , potential difference across 2Ω resistance will be same as potential difference across the other two resistors which are connected in parallel.

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