Class X

In all the electrical appliances, the switches are put in the
  1. live wire
  2. earth wire
  3. neutral wire
  4. All of these
  An electron enters a magnetic field at right angles to it. The direction of force acting on the electron will be
  1. To the right
  2. Out of the page
  3. To the left
  4. Into the page
  Two free parallel wires carrying currents in opposite directions:
  1. Attract each other
  2. Repel each other
  3. Do not affect each other
  4. Get moved to perpendicular to each other
  SI unit of magnetic field strength is
  1. Oersted
  2. Ampere
  3. Volt
  4. Ohm
The magnetic field lines inside a solenoid is in the form of :
  1. Curved line
  2. circular lines
  3. Zig -zag lines
  4. parallel straight lines
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