Physics: A long wire carries a current of 3.0A along the central axis of a long solenoid (radius=3.0cm, n=900 turns per meter, current=30.0mA). What is the magnitude of the magnetic field at a point 2.0cm from the axis of the solenoid (neglecting any end effects)?

A long wire carries a current of 3.0A along the

Ответ:

Spencerg325

21.01.2022

Physics

B = 63.93 μT

Explanation:

Current carried by the wire, I₁ = 3.0 A

Number of turns, n = 900 turns/ meter

Radius of the solenoid, R = 3 cm = 0.03 m

r = 2 cm = 0.02 m

Current due to the solenoid, I₂ = 30 mA = 0.03 A

The magnetic field is due to the current carrying conductor and the solenoid

Magnetic field due to the current carrying conductor:

$B_{1} = \frac{\mu I_{1} }{2\pi r} \\B_{1} = \frac{\mu 3}{2\pi *0.02}\\ B_{1} = \frac{\mu 3}{0.04\pi }$

Magnetic field due to the solenoid:

$B_{2} = \mu N I_{2} \\B_{2} = \mu * 900 * 0.03\\B_{2} = 27 \mu$

Add B₁ and B₂ together

B = B₁ and B₂

$B = \frac{\mu 3}{0.04\pi } + 27 \mu\\B = 50.87 \mu\\\mu = 4\pi * 10^{-7} \\B = 50.87 * (4\pi * 10^{-7})\\B = 63.93 * 10^{-6} T\\B = 63.93 \mu T$

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Ответ:

notmclovinyou

12.09.2022

Physics

D. weightlifting

Explanation:

Weight lifting is a kind of strength training practice in which the person lifts the weight bars, weight stacks, dumbbells, and other weight-bearing devices to oppose the force generated by the muscles. This practice helps in building up the strength of the muscles but it is least helpful in improving the flexibility. The flexibility of the body is brought about by stretching exercises, yoga and pilates.

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A long wire carries a current of 3.0A along the central axis of a long solenoid (radius=3.0cm, n=900 turns per meter, current=30.0mA). What is the magnitude of the magnetic field at a point 2.0cm from the axis of the solenoid (neglecting any end effects)?

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