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Bingel [31]
3 years ago
6

Question 3

Physics
1 answer:
Yuki888 [10]3 years ago
4 0

Answer:

Power = 2.5kW

Explanation:

Given

Mass = 200kg -- mass of tub

Energy = 200,000J

Time = 80s

Required

Determine the amount of power needed

Power is calculated as thus:

Power = \frac{Energy}{Time}

Substitute values for Energy and Time

Power = \frac{200,000J}{80s}

Power = 2500W

Divide by 1000 to convert to kW (kilowatt)

Power = 2.5kW

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3 years ago
a transformer has 1,400 turns in the primary coil and 100 turns in the secondary coil. if the primary coil is connected to a 120
harkovskaia [24]

0.56 A is the current of the secondary coil.

transformer is the device that transfer electric energy from one AC circuit to another.

we know that ;

I ∝ 1/n;

where I IS CURRENT and n is NUMBER OF TURNS.

(I) secondary = X A

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(I)  primary  = 0.04 A

(n)  primary  = 1400

USING THIS-----> I ∝ 1/n;

=>

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as the current in the transformer is inversely proportional to the number of turns so 0.56 A is the current in the secondary coil.

learn more about transformers-

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