Part 1: A 302-turn solenoid with a length of 31 cm and radius of 0.8 cm carries

Question

Part 1:
A 302-turn solenoid with a length of 31 cm
and radius of 0.8 cm carries a current of 2.7 A.
A second coil of 4 turns is wrapped tightly
about this solenoid so that it can be considered to have the same radius as the solenoid.
Find the change in the magnetic flux
through the coil when the current in the
solenoid increases to 6.2 A in a period of
1.44 s. The permeability of a vacuum is
4 10?7 T m/A
Answer in units of T m2

Part 2:
Find the magnitude of the average induced emf in the coil.
Answer in units of ?V

Explanation / Answer

= 4pi(8 x 10^-3)^2 x 4piE-7 (302/0.31)(6.2 - 2.7)/1.44

= 2.393 x 10^-6 V

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