Question: Q. 6. (i) Define mutual inductance.
(ii) A pair of adjacent coils has a mutual inductance of 1.5 H. If the current in one coil changes from 0 to
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Solution:
Ans. (i) Magnetic flux, linked with the secondary coil due to the unit current flowing in the primary coil,
[Alternatively,
Induced emf associated with the secondary coil, for a unit rate of change of current in the primary coil.
[Also accept the definition of Mutual Induction, as per the Hindi translation of the questions]
[i.e., the phenomenon of production of induced emf in one coil due to change in current in neighbouring coil]
(ii) Change of flux linkage
Detailed Answer :
[CBSE Marking Scheme, 2016]
(i) Try yourself, Similar to Q. 1 (a), Short Answer Type Questions-II
(ii) Given :
Mutual inductance of a pair of coils,
Final current
Change in current willb
and we know,
where,
Hence, change in the flux linkage will be
[1] Q. 7. Define the term self-inductance of a solenoid. Obtain the expression for the magnetic energy stored in an inductor of self-inductance
Ans. Try yourself, Similar to Q. 2, Short Answer Type Questions-I
