Physics

07.04.2020 00:03

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An ideal solenoid of length 10 cm consists of a wire wrapped tightly around a wooden

An ideal solenoid of length 10 cm consists of a wire wrapped tightly around a wooden core. The magnetic field strength is 4.0 T inside the solenoid. If the solenoid is stretched to 25 cm by applying a force to it, what does the magnetic field become

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ferg6

4,8(98 marks)

The magnetic field will become 1.6 T.

Explanation:

Given;

initial length of the solenoid, L₁ = 10 cm

final length of the solenoid, L₂ = 25 cm

Magnetic field inside a solenoid is given by;

$B = \frac{\mu_o NI}{L} \\\\BL =\mu_oNI = k\\\\BL = k\\\\B_1L_1 = B_2L_2\\\\B_2 = \frac{B_1L_1}{L_2}\\\\B_2 = \frac{4*10}{25}\\\\B_2 = 1.6 \ T$

Therefore, the magnetic field will become 1.6 T.

silverns

4,7(59 marks)

250 LB

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