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In the given circuit the internal resistance of the 18 V cell is negligible. If R 1 = 400 Ω , R 3 = 100 Ω and R 4 = 500 Ω and the reading of an ideal voltmeter across R 4 is 5 V, then the value of R 2 will be : R 3 R 4 R 2 R 1 18 V

1. 550 Ω
2. 450 Ω
3. 230 Ω
4. 300 Ω

Correct answer: 300 Ω

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