Question: In a single-phase switchboard, two parallel rectangular bus bars 1.1 in. apart at center lines experience 20,000 A rms current when a load gets short-circuit

In a single-phase switchboard, two parallel rectangular bus bars 1.1 in. apart at center lines experience 20,000 A_rms current when a load gets short-circuit fault. Determine the peak mechanical force per foot length of the bus bars. Assume the bus bar shape factor K = 0.8. State whether this force is attractive or repulsive.

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