The magnetic field inside a current carrying solenoid is
  • Increases as we move towards its ends
  • Decreases as we move towards its ends
  • Zero
  • Same at all points
Moving two like poles together usually causes a magnet resting on a table to repel and rotate. This occurs because:
  • Like magnetic poles repel
  • Unlike magnetic poles attract
  • Both of these
  • None of these
An electric current flowing through a conductor produces
  • Magnetic field
  • Electric Field
  • Both electric and magnetic field
  • Electromagnetic field
Magnetic lines of force originate from the
  • North pole
  • Center point
  • South pole
  • Either north pole or south pole
Electromagnet works on
  • Magnetic effect of current
  • Electric effect of current
  • Heating effect of current
  • Chemical effect of current
A magnetic field existing around a magnet can be represented by magnetic field lines. Magnetic field lines always form:
  • open loops
  • closed loops
  • straight lines
  • Both closed loops and straight lines
Which of the following statement concerning magnetic field is correct? (1) The part of a bar magnet, at which the magnetic field is the strongest, is called its pole. (2) A magnetic field is present near a compass needle. (3) There is no magnetic field inside a current-carrying solenoid.
  • (1) only
  • (2) and (3) only
  • (2) only
  • (1) and (2) only
A vertical wire carries a current straight down. To the east of this wire, the magnetic field points:
  • eastwards
  • downwards
  • southwards
  • northwards
Which of the following metal is not attracted by a magnet?
  • Cobalt
  • Nickel
  • Steel
  • Silver
In which direction does a freely suspended compass needle align itself?
  • North-South
  • East-West
  • North-east
  • North-west
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