Reciprocity theorem.
It states that “ co-efficient of mutual inductance of the coils remains same whether the current is flowing in coil-1 or in coil-2.
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What is electromagnet ?
Answer:- A magnet excited by the electric current flowing through the wires wound over soft iron pieces is called an electromagnet.
Mutual induction.
Answer:- Mutual induction of two circuits is the property by virtue of which a current changing in the first results in the induction of an e.m.f in the second.
Self induction.
Answer:- Self induction of a circuit is defined as the property of the circuit, by virtue of which it tends to oppose a change in the strength of current, through it, by inducing an e.m.f. in itself.
Lenz's law ?
Answer:- According to lenz's law the direction of induced emf is always such that it opposes the very cause producing it.
What is electromagnetic induction ?
Answer:- The phenomenon by which electric current is generated by varying magnetic field is appropriately called electromagnetic induction.
What is motional emf ?
Answer:- The emf which induced in the conductor due to their motion in magnetic field is called motional emf. e.g We know conductor have free electrons so when it move in magnetic field correspondingly electrons are moved therefore magnetic field produced force in electrons as the result their is a potential difference creat in the conductor which potential difference is called motional emf because it generate due to motion of the conductor in magnetic field.
What is Eddy current ?
Answer:- We know when magnetic flux linked with a circuit Changes their is a induced emf generate in the circuit which is called induced emf. Look at the figure In the given circuit 'i' increases so their is a induced emf in the copper wire which is called induced emf. And also their is a induced emf in the iron bar which is called Eddy current.