Question

The direction of Induced current is obtained by:
A. Fleming’s left hand rule
B. Right hand thumb rule
C. Biot savart law
D. Fleming’s right hand rule

Answer 1

An electric current can be induced in a conducting loop if it is exposed to an external changing magnetic field. The changing magnetic field causes varying magnetic fields across the conductor. As we know that the varying magnetic field gives rise to induced current, we can determine the direction of that induced using an electromagnetic rule.

Complete step by step answer:
The current induced in a conducting loop or a coil that is exposed to a changing magnetic field is known as induced current. An induced current has a direction in a way that the magnetic field due to the induced current opposes the variation in the magnetic flux that induces the current.
According to Faraday's law of electromagnetic induction, whenever a conductor is forcefully moved in an electromagnetic field, an electromotive force gets induced across the conductor. If we provide a closed path to the conductor, then the induced emf causes electric current to flow.

According to the Fleming's right hand rule, the thumb, the fore finger and the middle finger of the right hand are stretched to be mutually perpendicular to each other, and if the thumb represents the direction of the motion of the conductor, fore-finger represents the direction of the magnetic field; then the middle finger will represent the direction of the induced current. Fleming's right hand rule is applied in the electrical generators.

Note:
Fleming's left hand rule is used in order to find the direction of the force due to magnetic induction.
Right hand thumb rule is used to find the direction of magnetic lines of force due to electric current.
Biot-Savart law is used to find the magnitude and direction of the magnetic induction.
Fleming's right hand rule is used to find the direction of the induced current.