A 243-turn solenoid with a length of 21 cm

and radius of 0.9 cmcarries a current of 3 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 8 A in a period of

1.11 s. The permeability of a vacuum is

4 × 10−7 T · m/A

Answer in units of T · m2

and radius of 0.9 cmcarries a current of 3 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 8 A in a period of

1.11 s. The permeability of a vacuum is

4 × 10−7 T · m/A

Answer in units of T · m2

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