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aalyn [17]
2 years ago
14

A transformer is intended to decrease the value of the alternating current from 500 amperes to 25 amperes. The primary coil cont

ains 200 turns. Find the necessary number of turns N2 in the secondary coil.
Physics
1 answer:
EastWind [94]2 years ago
5 0

Answer:

The number of turns in secondary coil is 4000

Explanation:

Given:

Current in primary coil I_{P} = 500 A

Current in secondary coil I_{S} = 25 A

Number of turns in primary coil N_{P} = 200

In case of transformer the relation between current and number of turns is given by,

     \frac{N_{S} }{N_{P}  } = \frac{I_{P} }{I_{S} }

For finding number of turns in secondary coil,

     N_{S} = \frac{I_{P} }{I_{S} }  N_{P}

     N_{S} = \frac{500}{25} \times 200

     N_{S} = 4000

Therefore, the number of turns in secondary coil is 4000

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Answer:

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Let m1 and v1 denote your mass and velocity respectively

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Since v2 is v1+0.28v1=1.28v1

Substituting m1 for 86 Kg

m2=\frac { 86 Kg(v1)^{2}}{(1.28v1)^{2}}= 52.49023\approx 52.49 Kg

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Horace has invented a unique pair of reading glasses that have two small light bulbs at the bottom wired in series, so that he c
ElenaW [278]

Answer:

The current drawn by Horace’s reading glasses is 0.8 A.

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The kinetic energy of a rocket is increased by a factor of eight after its engines are fired, whereas its total mass is reduced
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The momentum increases by a factor of 2

Explanation:

We can solve this problem by rewriting the momentum of the rocket in terms of the kinetic energy and the mass.

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The momentum of the rocket is

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From eq.(1) we get

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Substituting, we find the new momentum:

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Learn more about momentum and kinetic energy:

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Answer:

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