Networks Analysis and Synthesis

Q1: The frame of an electric motor is earthed through three earthing plates resistances 30 Ω, 20 Ω and 10 Ω respectively. During fault the energy dissipated by three plates are W1, W2 and W3. Then

A W1 > W2 > W3

B W1 < W2 < W3

C W1 = W2 = W3

D W1 + W3 < W2

ANS:B - W1 < W2 < W3

Energy dissipated by the plate with lowest resistance is maximum.



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