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Category: Alternating Current

A step up transformer operates on a 230 V line and a load current of 2 ampere. The ratio of the primary and secondary winding is 1 : 25. What is the current in the primary ?

Rajesh Jha

Q: A step up transformer operates on a 230 V line and a load current of 2 ampere. The ratio…

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Posted in: Alternating Current, i. Physics : Q & A

A transformer having efficiency 90% is working on 100 V and at 2.0 kW power. If the current in the secondary coil is 5A, calculate the current in the primary coil…

Rajesh Jha

Q: A transformer having efficiency 90% is working on 100 V and at 2.0 kW power. If the current in…

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Posted in: Alternating Current, i. Physics : Q & A

An electric bulb has a rated power of 50 W at 100 V. If it used on an AC source of 200 V, 50 Hz, a choke has to be used in series with it. This choke should have an inductance of

Rajesh Jha

Q: An electric bulb has a rated power of 50 W at 100 V. If it used on an AC…

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Posted in: Alternating Current, i. Physics : Q & A

An ideal choke coil takes a current of 8 ampere when connected to an AC supply of 100 volt and 50 Hz. A pure resistor under the same condition takes a current of 10 ampere….

Rajesh Jha

Q: An ideal choke coil takes a current of 8 ampere when connected to an AC supply of 100 volt…

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Posted in: Alternating Current, i. Physics : Q & A

A 750 Hertz – 20 volt source is connected to a resistance of 100 ohm, an inductance of 0.1803 henry and a capacitance of 10μf, all in series. What is the time in which…

Rajesh Jha

Q: A 750 Hertz – 20 volt source is connected to a resistance of 100 ohm, an inductance of 0.1803…

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Posted in: Alternating Current, i. Physics : Q & A

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