If the current in the primary circuit of a pair of coils changes from 5 amp to 1 amp in 0.02 sec, calculate (i) induced emf in the secondary coil if the mutual inductance between the two coils is 0.5H and (ii) the change of flux per turn in the secondary, if it has 200 turns.

Explanation

To solve the given problem step by step, we will follow the instructions provided in the video transcript.

### Step 1: Calculate the Change in Current
The change in current (ΔI) can be calculated as follows:
\[ \Delta I = I_2 - I_1 \]
Where:
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