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adelina 88 [10]
2 years ago
6

Select the correct answer.

Physics
1 answer:
VladimirAG [237]2 years ago
8 0

Answer:

It's effective temperature.

Explanation:

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An AC adapter for a telephone answering machine uses a transformer to reduce the line voltage of 120 V to a voltage of 5.00 V. T
Maksim231197 [3]

Answer:

35

Explanation:

We are given that

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Final voltage, V_2=5 V

Number of tuns in primary coil of the transformer, N_p=840

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1 mA=10^{-3} A

We have to find the number of turns  are there on the secondary coil.

We know that

\frac{N_s}{N_p}=\frac{V_2}{V_1}

Using the formula

\frac{N_s}{840}=\frac{5}{120}

N_s=\frac{5}{120}\times 840=35

Hence, there are  number of turns on the secondary coil=35

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2 years ago
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