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 R2BT. R2B / T. RBT. 2RBT. R2BT. R2B / T. RBT. 2RBT. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory The effective reactance of an inductive coil increases because of stray capacitance as the frequency increases. decreases because of stray capacitance as the frequency increases. remains same irrespective of the frequency. none of these. increases because of stray capacitance as the frequency increases. decreases because of stray capacitance as the frequency increases. remains same irrespective of the frequency. none of these. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory The magnetic field required to reduce the residual magnetism to zero is called Retentivity. Coercivity. Hysteresis. Saturation magnetism. Retentivity. Coercivity. Hysteresis. Saturation magnetism. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory The critical frequency of ‘F’ layer is greater than 30 MHz. False True False True ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory The electrical field strength at a distance point A due to a point charge +q, located at the origin, is 100 µl v/m. If the point charge is now enclosed by a perfectly conducting metal sheet sphere whose centre is at origin, A, outside the sphere, becomes 100 μ v/m. 0. None of above. - 100 μ v/m. 100 μ v/m. 0. None of above. - 100 μ v/m. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory A point pole has a strength of 4π × 10-4 weber. The force in newtons on a point pole of 4π × 1.5 × 10-4 weber placed at a distance of 10 cm from it will be 3.75 N. 7.5 N. 20 N. 15 N. 3.75 N. 7.5 N. 20 N. 15 N. ANSWER DOWNLOAD EXAMIANS APP
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