Electromagnetic Field Theory A plane wave magnetic field is represented by Bx = cos(y – ct). The electric and magnetic fields will be zero in the direction None of these. Ey = Ez = 0, By = Bz = 0. Ex = Ey = 0, Bx = By = 0. Ex = Ey = 0, By = Bz = 0. None of these. Ey = Ez = 0, By = Bz = 0. Ex = Ey = 0, Bx = By = 0. Ex = Ey = 0, By = Bz = 0. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory A conductor is rotating with in a magnetic field. At which of the positions do the peak voltages occur? Anywhere. At an angle of 45° to the axis of the magnetic field. At right angles to the axis of the magnetic field. Along the axis of the magnetic field. Anywhere. At an angle of 45° to the axis of the magnetic field. At right angles to the axis of the magnetic field. Along the axis of the magnetic field. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory An insulated metal sphere of 20 cm diameter is charged by rubbing with charges 2 × 10-8 C. Potential developed will be 900 V. 200 V. 0 V. 1800 V. 900 V. 200 V. 0 V. 1800 V. 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) QR. QR2/d. Q√(R2 + d2). QD. QR. QR2/d. Q√(R2 + d2). QD. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory The main purpose of choke is none of above. to pass low frequencies. to pass high frequencies. to block low frequencies. none of above. to pass low frequencies. to pass high frequencies. to block low frequencies. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory When the phase velocity of an EM wave depends on frequency in any medium the phenomenon is called Dispersion Scattering Polarisation Absorption Dispersion Scattering Polarisation Absorption ANSWER DOWNLOAD EXAMIANS APP
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