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liubo4ka [24]
3 years ago
7

A long solenoid that has 1,140 turns uniformly distributed over a length of 0.415 m produces a magnetic field of magnitude 1.00

10-4 T at its center. What current is required in the windings for that to occur?
Physics
1 answer:
mezya [45]3 years ago
3 0

Answer:

Therefore,

Current required is , I

I = 0.0289\ Ampere

Explanation:

Given:

Turns = N = 1140

length of solenoid = l = 0.415 m

Magnetic Field,

B = 1.00\times 10^{-4}\ T

To Find:

Current , I = ?

Solution:

If N is the number of turns in the length, the total current through the rectangle is NI. Therefore, Ampere’s law applied to this path gives

\int {B} \, ds= Bl=\mu_{0}NI

Where,  

B = Strength of magnetic field

l = Length of solenoid

N = Number of turns

I = Current

\mu_{0}=Permeability\ in\ free\ space=4\pi\times 10^{-7}\ Tm/A

Therefore,

I =\dfrac{Bl}{\mu_{0}N}

Substituting the values we get

I =\dfrac{1.00\times 10^{-4}\times 0.415}{4\times 3.14\times 10^{-7}\times 1140}=0.0289\ Ampere

Therefore,

Current required is , I

I = 0.0289\ Ampere

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