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

 Ey = Ez = 0, By = Bz = 0.
 None of these.
 Ex = Ey = 0, Bx = By = 0.
 Ex = Ey = 0, By = Bz = 0.

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Electromagnetic Field Theory
Which of following is true for a purely inductive circuit ?

 Actual power of the circuit is zero.
 Apparent power of the circuit is zero.
 Reactive power of the circuit is zero.
 Any capacitance even if present in the circuit will not be charged.

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Electromagnetic Field Theory
A rectangular waveguide is a

Tube antenna to transmit and receive electromagnetic waves
Rectangular conducting wire to propagate electromagnetic waves
Hollow rectangular conducting tube through which electromagnetic waves can be propagat-ed
Hollow rectangular walled room carrying electromagnetic wave

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