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. Will the potential difference across the 2 ohms resistor be the same as that across the parallel combination of 4 ohms resistors? Give reasons.

Answer 1

The circuit is shown as the figure:

Effective resistance of combination of two resistors (4 ohms each) in parallel is

\(R_{eff} = \frac{4 \times 4}{4 + 4} = 2 \Omega\)

The potential difference across the 2Ω resistor be the same as that across the parallel combination of 4Ω resistors.