1)

An induced emf has


A) a direction same as field direction

B) a direction opposite to the field direction

C) no direction of its own

D) None of the above

Answer:

Option C

Explanation:

 From Lentz's law, the direction of induced emf in a circuit is such that it opposes the magnetic flux that produces it.

  So, if the magnetic flux linked with closed-circuit increases the induced current flows in a direction so as to develop a magnetic flux in the opposite direction of the original flux.

 If the magnetic flux linked with a closed circuit decreases then the induced current flows in the same direction of the original flux. So, the induced emf has not the direction of its own