A fuse is connected in series with the circuit it protects.
  • True
  • False
The magnetic field at the center of a current-carrying coil is perpendicular to the plane of the coil.
  • True
  • False
A motor is used to generate electricity from the mechanical motion of a coil.
  • True
  • False
A generator is used to generate electricity from the mechanical motion of a coil.
  • True
  • False
Maxwell’s right-hand thumb rule is used to find the direction of the magnetic field due to a straight current
  • True
  • False
The current through a short circuit is very high.
  • True
  • False
Which of the following describes the common domestic power supplied in India?
  • 220 V, 100 Hz
  • 220 V, 50 Hz
  • 110 V, 50 Hz
  • 110V, 100 Hz
A magnetic field line is used to find the direction of
  • south-north
  • a compass needle
  • a bar magnet
  • magnetic field
A battery provides an AC voltage.
  • True
  • False
In the arrangement shown in the figure there are two coils wound on a non-conducting cylindrical rod. Initially the key is not inserted. Then the key is inserted and later removed. Then
  • the deflection in the galvanometer remains zero throughout.
  • there is a momentary deflection in the galvanometer but it dies out shortly and there is no effect when the keys is removed.
  • there are momentary galvanometer deflections that die out shortly; the deflections are in the same direction.
  • there are momentary galvanometer deflections that die out shortly; the deflection are in opposite directions.
A constant current flows in a horizontal wire in the plane of the paper from east to west as shown in the figure. The direction of magnetic field at a point will be North to South
  • directly above the wire
  • directly below the wire
  • at a point located in the plane of the paper, on the north side of the wire
  • at a point located in the plane of the paper, on the south side of the wire.
If the key in the arrangement figure given below is taken out (the circuit is made open) and magnetic . field lines are drawn over the horizontal plane ABCD, the lines are
  • concentric circles
  • elliptical in shape
  • straight lines parallel to each other (Due to earth’s magnetic field)
  • concentric circles near the point O but of elliptical shapes as we go away from it.
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