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Electric circuits miscellaneous

  1. In the given circuit, voltages V1 and V2 respectively are

    1. – 68.6 V, 114.3 V
    2. 68.6 V, – 114.3 V
    3. 114.3 V, – 68.6 V
    4. – 114.3 V, 68.6 V
Correct Option: B

I1 = 10 × 10– 3 V1 – 5 × 10– 3V2
100 = 25I1 + V1
100 – V1 = 0.25V1 – 0.125 V2
⇒ 800 = 10 V2....(i)
I 2 = 50 × 10– 3 V1 + 20 × 10– 3V2
V2 = – 100 I2
∴ V2 = 5V1 – 2V2
⇒ 3V2 + 5V1 = 0 ....(ii)
Solving equations (i) and (ii), we get
V1 = 68.6 V, and V2 = – 114.3 V



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