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Three-Phase Systems in Power Applications

Q1:

A single-phase sinusoidal voltage of 120 V is connected to a 90  load. Current in the circuit is

A 13.3 mA

B 133 mA

C 1.33 A

D 6.2 A

ANS:C - 1.33 A

Given Vrms = 120V and R = 90 ohms.

Current in the circuit Irms = Vrms/R.
Irms = 120/90.
Irms = 1.33A.



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