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Question
Why induced emf is called back EMF?
Why induced emf is called back EMF?
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Solution
Induced EMF: When we pass the current through a solenoid/coil, then the magnetic flux associated with this coil will change, and to oppose this change in flux a potential difference is generated in the opposite direction which is known as induced emf.
Reasons why induced emf is called back emf:
- There is a current associated with this induced emf called induced current.
- The direction of induced current in the solenoid is such that it opposes the change in magnetic flux in the coil.
- The polarity of induced emf is such that it does not allow the magnetic flux to change in the solenoid.
These are the reasons why induced emf is also called back emf.
Induced EMF: When we pass the current through a solenoid/coil, then the magnetic flux associated with this coil will change, and to oppose this change in flux a potential difference is generated in the opposite direction which is known as induced emf.
Reasons why induced emf is called back emf:
- There is a current associated with this induced emf called induced current.
- The direction of induced current in the solenoid is such that it opposes the change in magnetic flux in the coil.
- The polarity of induced emf is such that it does not allow the magnetic flux to change in the solenoid.
These are the reasons why induced emf is also called back emf.
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