Electromagnetic Field Theory A fan blade of length 2R rotates in a time period T in a magnetic field B. The induced voltage in the blade is proportional to RBT. 2RBT. R2B / T. R2BT. RBT. 2RBT. R2B / T. R2BT. ANSWER DOWNLOAD EXAMIANS APP
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. 60 V. 8 V. 80 V. 40 V. 60 V. 8 V. 80 V. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory In a lossless medium the intrinsic impedance η = 60π and μr = 1. The relative dielectric constant εr shall be 1. 8. 4. 2. 1. 8. 4. 2. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory As a result of reflection from a plane conducting wall, electromagnetic waves acquire an apparent velocity greater than the velocity of light in space. This is called the group velocity. phase velocity. normal velocity. velocity of propagation. group velocity. phase velocity. normal velocity. velocity of propagation. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory A coil of 300 turns is wound on a non magnetic core having a mean circumference of 300 mm and a cross sectional area of 300 mm2. The inductance of the coil corresponding to a magnetizing current of 6 A will be 3.768 μH. 1.1304 μH. 37.68 μH. 113.04 μH. 3.768 μH. 1.1304 μH. 37.68 μH. 113.04 μH. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory The magnetic field at any point on the axis of current carrying circular coil will be zero. parallel to axis. at an angle 45o with the axis. perpendicular to axis. zero. parallel to axis. at an angle 45o with the axis. perpendicular to axis. ANSWER DOWNLOAD EXAMIANS APP