What change in the deflection of the compass needle placed at a point near current carrying straight conductor shall be observed if the

What change in the deflection of the compass needle placed at a point near current carrying straight conductor shall be observed if the

  1. current through the conductor is increased?
  2. direction of current in the conductor is reversed?
  3. compass is moved away from the conductor?

Answer:

  1. Deflection increases.
  2. Direction of deflection is reversed.
  3. Deflection decreases.