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A 310 turn solenoid with a length of 18.0 cm and a radius of 1.30 cm carries a current of 1.70 A. A second coil of four turns is wrapped tightly around this solenoid, so it can be considered to have the same radius as the solenoid. The current in the 310 turn solenoid increases steadily to 5.00 A in 0.900 s.

(a) Use to calculate the initial magnetic field in the middle of the 310 turn solenoid.

T

(b) Calculate the magnetic field of the 310 turn solenoid after 0.900 s.

T

(c) Calculate the area of the 4-turn coil.

m2

(d) Calculate the change in the magnetic flux through the 4-turn coil during the same period.

Wb

(e) Calculate the average induced emf in the 4-turn coil.

V

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