Physics Mcqs

An electromagnetic wave consists of _____________________?
  • (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
An alternating current or voltage_____________________?
  • (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