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cricket20 [7]
3 years ago
8

A solenoid has length

Physics
1 answer:
asambeis [7]3 years ago
5 0

Answer:

The magnetic field is 24.2 mT.

Explanation:

The magnetic field can be calculated with the following equation:

B = \frac{\mu_{0}iN}{L}

Where:

i: is the current = 5.57 A

N: is the number of turns = 5*850 turns (it is five close-packed)

L: is the length = 1.23 m

\mu_{0}: is the permeability = 4π*10⁻⁷ T*m/A          

Hence, the magnetic field is:

B = \frac{4\pi \cdot 10^{-7} T*m/A*5.57 A*5*850}{1.23 m} = 0.0242 T = 24.2 mT

Therefore, the magnetic field is 24.2 mT.

I hope it helps you!                                  

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3 years ago
If two persons do the same amount of work , they may have different power ? why ? ​
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A horizontal spring with spring constant 130 N/m is compressed 17 cm and used to launch a 2.8 kg box across a frictionless, hori
olasank [31]

Explanation:

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Now, spring energy gets converted into kinetic energy when the box is launched.

So,    \frac{1}{2}kx^{2} = \frac{1}{2}mv^{2}

   \frac{1}{2} \times 130 \times (0.17)^{2} = \frac{1}{2} \times 2.8 \times v^{2}

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                     = 1.34

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           Frictional force = \mu \times mg

                                    = 0.15 \times 2.8 \times 9.8

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           \frac{1}{2} \times 2.8 \times (1.15)^{2} = 4.116 \times d

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Answer:

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