Electromagnetic Field Theory What is the value of skin depth as 100 Hz in a material having μr = 1.0 and & σ = 3.60 × 107 s/m 8.4 mm. 4 mm. 2.4 mm. 10 mm. 8.4 mm. 4 mm. 2.4 mm. 10 mm. ANSWER DOWNLOAD EXAMIANS APP
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. 2RBT. R2B / T. RBT. R2BT. 2RBT. R2B / T. RBT. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory A circular ring is carrying uniformly distributed charge q and a point charge – Q on the axis of the ring. The magnitude of dipole moment of the charge system is (Assume distance between centre of ring and point charge is d and radius of ring R) QD. QR2/d. Q√(R2 + d2). QR. QD. QR2/d. Q√(R2 + d2). QR. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory Two coils have inductances L1 = 1200 mH and L2 = 800 mH. They are connected in such a way that flux in the two coils aid each other and inductance is measured to be 2500 mH, then Mutual inductance between the coils is ___________ mH. 250. 150. 225. 145. 250. 150. 225. 145. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory If an electric current carrying coil is placed in a uniform magnetic field in the direction of magnetic induction, then the net force is finite but torque is zero. the net force and torque are both finite. the net force is zero but torque is finite. the net force and torque on the coil are both zero. the net force is finite but torque is zero. the net force and torque are both finite. the net force is zero but torque is finite. the net force and torque on the coil are both zero. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory In above question no. 9, the average force on the core to reduce the air gap will be 1666.22 N. 832.29 N. 6664.8 N. 3332.47 N. 1666.22 N. 832.29 N. 6664.8 N. 3332.47 N. ANSWER DOWNLOAD EXAMIANS APP
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