Induced emf is also called back emf. Why?
Important Questions on Electromagnetic Induction
A metallic rod held horizontally along east-west direction is allowed to fall under gravity. Will there be an emf induced at its ends? Justify your answer.
A cylindrical bar magnet is kept along the axis of a circular coil. Will there be a current induced in the coil if the magnet is rotated about its axis? Give reason.
A vertical metallic pole falls down through the plane of the magnetic meridian. Will any emf be produced between its ends? Give reason for your answer.
The electric current flowing in a wire in the direction to is decreasing. What is the direction of induced current in the metallic loop kept above the wire as shown in Fig.
A conducting loop is held above a current-carrying wire '' as shown in the figure. Depict the direction of the current induced in the loop when the current in the wire is constantly increasing.
Give the direction in which the induced current flows in the wire loop when the magnet moves towards it as shown in Fig. How will the position of the loop be affected?
Will there be any current induced in the coil shown in Fig if a bar magnet is swiftly moved towards or away from the coil. If yes, what will be the direction of current?
