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Potential of earth is – 50 V. If the potential difference between anode and cathode (earthed) is measured as 150 V, actual voltage on anode is __________(a) 0 V(b) 100 V(c) 200 V(d) 250 VThis question was posed to me in a job interview.Enquiry is from Advanced Problems on Millman’s Theorem and Maximum Power Transfer Theorem in section Useful Theorems in Circuit Analysis of Network Theory

Answer»

The correct answer is (c) 200 V

The best explanation: GIVEN that, potential difference between ANODE and CATHODE (earthed) is MEASURED as 150 V and potential of EARTH is – 50 V.

So, actual voltage on anode, V = 150 – (- 50)

= 150 + 50

= 200 V.



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