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The current in a solenoid of 500 turns, ...

The current in a solenoid of 500 turns, having length of 15 cm and a radius of 5 cm, is 3.5 A. The current is suddenly switched off in a short duration of Ims. Calculate the average back emf induced across the ends of the open switch in the circuit.

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To solve the problem of calculating the average back emf induced across the ends of the open switch in the circuit when the current in a solenoid is suddenly switched off, we can follow these steps: ### Step 1: Convert the given dimensions to SI units - Length of the solenoid, \( L = 15 \, \text{cm} = 0.15 \, \text{m} \) - Radius of the solenoid, \( r = 5 \, \text{cm} = 0.05 \, \text{m} \) ### Step 2: Calculate the area of the solenoid The area \( A \) of the cross-section of the solenoid can be calculated using the formula for the area of a circle: ...
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