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A transformer is intended to decrease the value of the alternating voltage from 500 volts to...

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Physics

A transformer is intended todecrease the value of the alternating voltage from 500 volts to 25volts. The primary coil contains 200 turns. Find the necessarynumber of turns N2 in thesecondary coil.

A transformer is intended to decrease the value of thealternating current from 500 amperes to 25 amperes. The primarycoil contains 200 turns. Find the necessary number of turnsN2 in the secondary coil.

In a transformer, the primary coil contains 400 turns, and thesecondary coil contains 80 turns. If the primary current is 2.5amperes, what is the secondary current I2?

A transformer supplies 60 watts of power to a device that israted at 20 volts. The primary coil is connected to a 120-volt acsource. What is the current I1 in the primary coil?

The voltage and the current in the primary coil of anonideal transformer are 120 volts and 2.0 amperes. Thevoltage and the current in the secondary coil are 19.4 volts and11.8 amperes. What is the efficiency e of the transformer?The efficiency of a transformer is defined as the ratio of theoutput power to the input power, expressed as a percentage:e=100Pout/Pin.

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