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How does the mutual inductance of a pair...

How does the mutual inductance of a pair of coils change when
(i) distance between the coils is increased and
(ii) number of turns in the coils is increased?

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How is mutual inductance of a pair of coils affected when (i) separation between the coils in increased, (ii) the number of turns of each coil is increased , (iii) a thin iron sheet is placed between the two coils, other factors ramaining the same ? Explain your answer in each case.

Mutual inductance of two coils can be increased by

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The mutual inductance M_(12) of coil 1 with respect to coil 2

CBSE COMPLEMENTARY MATERIAL-UNIT–III & UNIT–IV MAGNETIC EFFECTS OF CURRENT AND MAGNETISM & E.M.I. AND ALTERNATING CURRENT-SHORT ANSWER QUESTIONS (2 Marks)
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