As a new electrical technician, you are designing a large solenoid to produce a

Question

As a new electrical technician, you are designing a large solenoid to produce a uniform 0.140-T magnetic field near the center of the solenoid. You have enough wire for 3000 circular turns. This solenoid must be 58.0 cm long and 4.00 cm in diameter. Part A What current will you need to produce the necessary field? Express your answer to three significant figures and include the appropriate units.

Part A

What current will you need to produce the necessary field?

Express your answer to three significant figures and include the appropriate units.

Explanation / Answer

B = mu0 N I / L

I = B L / mu0 N

= (0.14 * 0.58) / (4 pi * 10-7 * 3000)

current = 21.54 A

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