Electromagnetic Field Theory A magnetic circuit requires 800 AT to produce a certain quantity of flux in a magnetic circuit. If its excitation coil has 100 turns and 5 Ohm resistance, the voltage to be applied in exciting coil is 40 V. 80 V. 8 V. 60 V. 40 V. 80 V. 8 V. 60 V. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory The energy stored in the magnetic field in a solenoid 10 cm long and 4 cm diameter wound with 2000 turns of wire carrying a current at 20 amp, is 15 joules. 30 joules. 24 joules. 12 joules. 15 joules. 30 joules. 24 joules. 12 joules. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory The hysteresis loop of a magnetic material has an area of 5 cm2 with the scale given as 1 cm = 2 AT and 1 cm = 50 mwb At 50 Hz; the total hysteresis loss is 20 W. 25 W. 50 W. 15 W. 20 W. 25 W. 50 W. 15 W. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory Find H for centre of solenoid having finite length d = 1 unit where N = no of turns = 500, I = 2 A. 500. None of these. 100. 1000. 500. None of these. 100. 1000. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory The critical frequency of ‘F’ layer is greater than 30 MHz. True False True False ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory A medium is said to be isotropic when ∈ = μ. ∈ = μσ. ∈ is a scalar constant. ∈ is zero. ∈ = μ. ∈ = μσ. ∈ is a scalar constant. ∈ is zero. ANSWER DOWNLOAD EXAMIANS APP
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