1 year ago

Hi pls answer 11 point pls

Physics

1 answer:

Lelechka [254]1 year ago

6 0

Answer:

the answer is a. a ball is moving towards the camera faster then slower

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The plane of a rectangular coil, 7.2 cm by 3.7 cm, is perpendicular to the direction of a uniform magnetic field B. If the coil

netineya [11]

Answer:

The rate of change of magnetic field is 2.23 T/s.

Explanation:

Given that,

Dimension of rectangular coil is 7.2 cm by 3.7 cm.

Number of turns in the coil, N = 104

Resistance of the coil, R = 12.4 ohms

Current, I = 0.05 A

We need to find the rate of change of magnetic field in the coil. The induced emf is given by the rate of change of magnetic flux. So,

$\epsilon=-\dfrac{d\phi}{dt}$

Ohm's law is :

$\epsilon=IR$

So,

$IR=-\dfrac{d\phi}{dt}\\\\IR=-\dfrac{d(NBA)}{dt}\\\\IR=-NA\dfrac{dB}{dt}\\\\\dfrac{dB}{dt}=\dfrac{IR}{NA}\\\\\dfrac{dB}{dt}=\dfrac{0.05\times 12.4}{104\times 7.2\times 10^{-2}\times 3.7\times 10^{-2}}\\\\\dfrac{dB}{dt}=2.23\ T/s$

So, the rate of change of magnetic field is 2.23 T/s.

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2 years ago

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Alisiya [41]

The answer would be A

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2 years ago

a boy steps off the end of a high diving board and drops into the water below. it takes the boy 0.78 seconds to reach the water.

tino4ka555 [31]

Answer:

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Explanation:

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1 year ago

A teen who weighs 180 pounds normally is standing on a scale inside an elevator The elevator is moving downwards with a constant

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174

Explanation:

and 182

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25% i believe because if were talking 50 percent half it would be 25.

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