A transformer works on the principle of
A transformer works on the principle of
The correct option is D Mutual induction
The explanation for the correct option
(D) - Mutual induction
- Whenever there is a change in the magnetic flux in the primary coin an emf is induced in the secondary coil this phenomenon is called mutual induction.
- Transformers work based on mutual induction.
- Transformer has two winding - primary winding and secondary winding.
- Input signal is given to primary winding.
- By mutual induction voltage and current is induced in the secondary winding.
- Transformer works on the principle of Faraday's law of electromagnetic induction (mutual).
- Faraday's first law of electromagnetic induction states that “whenever a conductor is placed in a varying magnetic field an emf is induced. If the conductor circuit is closed, a current is induced, called induced current.
The explanation for incorrect option
Option A:
Lenz's Law: Lenz's law, named after the physicist Emil Lenz who formulated it in 1834, says that the direction of the electric current induced in a conductor by a changing magnetic field is such that the magnetic field created by the induced current opposes changes in the initial magnetic field.
Option B:
Ampere law: Ampere's Law states that for any closed loop path, the sum of the length elements times the magnetic field in the direction of the length element is equal to the permeability times the electric current enclosed in the loop.
Option C:
Self induction : When the current in a coil changes the magnetic flux linked with the coil also changes and hence emf is induced in the coil. this phenomenon is known as self-induction.
Hence, option (d) is correct.
Mutual induction
The explanation for the correct option
(D) - Mutual induction
- Whenever there is a change in the magnetic flux in the primary coin an emf is induced in the secondary coil this phenomenon is called mutual induction.
- Transformers work based on mutual induction.
- Transformer has two winding - primary winding and secondary winding.
- Input signal is given to primary winding.
- By mutual induction voltage and current is induced in the secondary winding.
- Transformer works on the principle of Faraday's law of electromagnetic induction (mutual).
- Faraday's first law of electromagnetic induction states that “whenever a conductor is placed in a varying magnetic field an emf is induced. If the conductor circuit is closed, a current is induced, called induced current.
The explanation for incorrect option
Option A:
Lenz's Law: Lenz's law, named after the physicist Emil Lenz who formulated it in 1834, says that the direction of the electric current induced in a conductor by a changing magnetic field is such that the magnetic field created by the induced current opposes changes in the initial magnetic field.
Option B:
Ampere law: Ampere's Law states that for any closed loop path, the sum of the length elements times the magnetic field in the direction of the length element is equal to the permeability times the electric current enclosed in the loop.
Option C:
Self induction : When the current in a coil changes the magnetic flux linked with the coil also changes and hence emf is induced in the coil. this phenomenon is known as self-induction.
Hence, option (d) is correct.
