A. Sound waves
B. Electromagnetic waves
C. Radio waves
D. Modulated waves
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A. Electric and magnetic fields moving parallel to each other
B. Magnetic field moving with velocity of light in space
C. Electric field moving with velocity of light
D. Electric and magnetic fields moving perpendicular to each other
A. λ-rays
B. Positive rays
C. Cathode rays
D. More than sound waves
A. fluctuates off and on
B. varies in magnitude alone
C. changes its direction again and again
D. changes its magnitude harmonically and reverses its direction of flow after regularly recurring intervals
A. 4 volt
B. 5 volt
C. 2 volt
D. 0.4 volt
A. weaken it
B. strengthen it
C. reverse its polarity
D. demagnetize it completely
A. very low damping
B. very high damping
C. no damping at all
D. radial field disintegration
A. a straight line parallel to the field
B. a parabola in a plane perpendicular to the field
C. a circle in a plane perpendicular to the field
D. a straight line along its initial direction
A. use a very long and fine suspension
B. use a coil of very large area
C. use a coil with very large number of turns
D. use a very strong magnetic field
A. in series with the circuit
B. in parallel with circuit
C. in series with any of the parallel resistances in the circuit
D. in parallel with any of the series resistances in the circuit
