InterviewSolution
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InterviewSolution
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In the circuit shown in figure, reading of voltmeter is `V_1` when only `S_1` is closed, reading of voltmeter is `V_2` when only `S_2` is closed, and reading of voltmeter is `V_3` when both `S_1 and S_2` are closed. Then . A. `V_(3) gt V_(2) gt V_(1)`B. `V_(2) gt V_(1) gt V_(3)`C. `V_(3) gt V_(1) gt V_(2)`D. `V_(1) gt V_(2) gt V_(3)` |
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Answer» Correct Answer - B (b) In series , potential difference `prop R` When only `S_(1)` is closed, `V_(1) = (3)/(4) E = 0.75 E` When only `S_(2)` is closed, `V_(2) = (6)/(7) E = 0.86 E` and when both `S_(1)` and `S_(2)` are closed combined resistance of `6R` and `3R` is `2R`. `V_(3) = ((2)/(3)) E = 0.67 E` Hence `V_(2) gt V_(1) gt V_(3)`. |
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