A relay coil is connected to a 210 V, 50 Hz supply. If it has resistance of 30Ω and an inductance of 0.5 H, the apparent power is
Apparent power
In the circuit shown in fig. P1.7.35 power factor is
The power factor seen by the voltage source is
The average power supplied by the dependent source is
In the circuit of fig. P1.7.38 the maximum power absorbed by Z_{L} is
The value of the load impedance, that would absorbs the maximum average power is
In a balanced Y–connected three phase generator V_{ab} = 400 V_{rms}
Q. If phase sequence is abc then phase voltage V_{a}, V_{b},and V_{c} are respectively
In a balanced Y–connected three phase generator V_{ab} = 400 V_{rms}
Q. If phase sequence is acb then phase voltage are
For the acb sequence
A balanced threephase Yconnected load has one phase voltage V_{c} = 277∠45^{0}V. The phase sequence is abc. The line to line voltage V_{AB} is
A threephase circuit has two parallel balanced Δ loads, one of the 6Ω resistor and one of 12 Ω resistors. The magnitude of the total line current, when the linetoline voltage is 480 V_{rms} ,is
Z A = 6 12 = 4,
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