A very long, straight solenoid with a diameter of 3.00 cm is wound with 40 turns of wire per centimeter, and the windings carry a current of 0.240 A. A second coil having N turns and a larger diameter is slipped over the solenoid so that the two are coaxial. The current in the solenoid is ramped down to zero over a period of 0.70 s. What average emf is induced in the second coil if it has a diameter of 3.90 cm and N = 48? Express your answer in microvolts to two significant figures. What is the induced emf if the diameter is 7.80 cm and N = 96? Express your answer in volts to two significant figures.

Induced emf in first coil is 0.986 and in second case 0.396

Explanation:

Given:

Number of turns per centimeter

Current A

Current rate

The magnetic field in solenoid is given by,

Where

We write,

(A)

Number of turns

Radius of coil m

From faraday's law

Where

(B)

Number of turns

Radius of coil m

From faraday's law

Where

Therefore, induced emf in first coil is 0.986 and in second case 0.396

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your question asks at which segment does freezing occur.

since we're talking about water, the freezing point of water will be 32 degrees fahrenheit or below.

hope this ! ~

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