Electromagnetic Field Theory An electric dipole of moment P is placed in front of a ground sphere. The change induced on the surface of the sphere is (Assume radius of sphere = R and distance from dipole to centre of sphere = d) PR 2/d3. PR/d2. Zero. PR/d. PR 2/d3. PR/d2. Zero. PR/d. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory The force experienced by a current carrying conductor lying parallel to a magnetic field is Bil sinθ. Bil cosθ. zero. BIL. Bil sinθ. Bil cosθ. zero. BIL. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory Two coils are coupled in such a way that the mutual inductance between them is 20 mH. If the inductances of the coils are 40 mH and 50 mH respectively, the coefficient of coupling is 0.447. 0.577. 0.477. 0.01. 0.447. 0.577. 0.477. 0.01. 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) Q√(R2 + d2). QR2/d. QR. QD. Q√(R2 + d2). QR2/d. QR. QD. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory Materials subjected to rapid reversals of magnetism should have high permeability. both a and b. low hysteresis loss. low permeability. high permeability. both a and b. low hysteresis loss. low permeability. 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. equal to that of disc and in the opposite direction. less than that of disc and in the same direction. less than that of disc but in opposite direction. equal to that of disc and in the same direction. equal to that of disc and in the opposite direction. less than that of disc and in the same direction. less than that of disc but in opposite direction. ANSWER DOWNLOAD EXAMIANS APP
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