The reading of an ideal voltmeter in the circ | vedclass

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(D) The circuit consists of two parallel branches connected to a $2 	ext{ V}$ battery.In the upper branch,the resistors $20 \ \Omega$ and $30 \ \Omeg

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$0.4$

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(D) The circuit consists of two parallel branches connected to a $2 	ext{ V}$ battery.In the upper branch,the resistors $20 \ \Omega$ and $30 \ \Omega$ are in series. The potential at the junction $V_1$ is given by the voltage divider rule: $V_1 = 2 	ext{ V} 	imes \frac{30 \ \Omega}{20 \ \Omega + 30 \ \Omega} = 2 	imes \frac{30}{50} = 1.2 	ext{ V}$.In the lower branch,the resistors $30 \ \Omega$ and $20 \ \Omega$ are in series. The potential at the junction $V_2$ is given by: $V_2 = 2 	ext{ V} 	imes \frac{20 \ \Omega}{30 \ \Omega + 20 \ \Omega} = 2 	imes \frac{20}{50} = 0.8 	ext{ V}$.The reading of the ideal voltmeter is the potential difference between the two junctions: $V = |V_1 - V_2| = |1.2 	ext{ V} - 0.8 	ext{ V}| = 0.4 	ext{ V}$.

The reading of an ideal voltmeter in the circuit shown is.....$V$.

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