Electromagnetic Field Theory Midway between two equal and similar charges, a third equal and similar charge is placed, then this third charge will be in unstable equilibrium. will move out of the field of influence of two charges. not be equilibrium. remain in stable equilibrium. be in unstable equilibrium. will move out of the field of influence of two charges. not be equilibrium. remain in stable equilibrium. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory Which of following is true for a purely inductive circuit ? Reactive power of the circuit is zero. Apparent power of the circuit is zero. Actual power of the circuit is zero. Any capacitance even if present in the circuit will not be charged. Reactive power of the circuit is zero. Apparent power of the circuit is zero. Actual power of the circuit is zero. Any capacitance even if present in the circuit will not be charged. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory Magnetic circuit with cross sectional area of 20 cm2 is to be operated at 50 Hz from 120 Vrms supply. The number of turns required to active a peak magnetic flux density of 1.8 T in the core flux is 450. 150. 300. 600. 450. 150. 300. 600. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory A magnetic material has a total flux B of 80 micro Wb with an mmf of 160 AT. The reluctance in ampere turn per weber is 2 × 108. 2 × 106. 2 × 10-8. 2 × 10-6. 2 × 108. 2 × 106. 2 × 10-8. 2 × 10-6. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory A copper disc is rotated rapidly below a freely suspended magnetic needle. The magnetic needle starts rotating with velocity equal to that of disc and in the same direction. less than that of disc but in opposite direction. less than that of disc and in the same direction. equal to that of disc and in the opposite direction. equal to that of disc and in the same direction. less than that of disc but in opposite direction. less than that of disc and in the same direction. equal to that of disc and in the opposite direction. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory The magnetic field required to reduce the residual magnetism to zero is called Retentivity. Coercivity. Saturation magnetism. Hysteresis. Retentivity. Coercivity. Saturation magnetism. Hysteresis. ANSWER DOWNLOAD EXAMIANS APP
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