Transformer are used in ………....

Transformer are used in ……….

DC circuits only

AC circuits only

Integrated circuits

All above these

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The output power in step-up transformer used in practice is …..

240 A.C. mains supply is given to one transformer which draws 0.7 A from it. This transformer is used to operate a bulb having power rating "24 V, 140 W". Then efficiency of this transformer is ......

A step-up transformer is used on a 120V line to provide a potential difference of 240V, if the primary coil has 75 turns the number of turns in the secondary coil is ……..

Generally, core of transformer is made up of ……...

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Working of a transformer is based upon principle of …...

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KUMAR PRAKASHAN-ALTERNATING CURRENTS -SECTION-D MCQs (DARPAN BASED ON TEXTBOOK)

The ratio of primary and secondary turns in a transformer is 3:2, if 3...
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If current is not obtained from secondary coil of an ideal transformer...
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If number of turns in primary and secondary coils is increased to two ...
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If for an ideal step-up transformer current in primary is IP and curre...
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A transformer has an efficiency of 80%. It works at 100V and 4kW. If s...
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For step-down transformer value of transformation ratio is ……….
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In a step-up transformer, use of 120 V line provides a potential diffe...
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In a noiseless transformer, an alternating current of 2A is flowing in...
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A low loss transformer has 250 V applied to primary and gives 4.6 V in...
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In an ideal transformer, the voltage is stepped down from 11 kV to 220...
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The ratio of number of turns in primary and secondary coil of a transf...
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The number of turns in primary and secondary of a transformer are 1000...
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A transformer is having 2100 turns in primary and 4200 turns in second...
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Transformer are used in ……….
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A step-up transformer is used on a 120V line to provide a potential di...
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The power is transmitted from a power house on high voltage a.c. becau...
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Number of turns in the primary coil and the secondary coil of an ideal...
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In one series A.C. circuit, maxima of current and voltage occur at the...
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When A.C. current with frequency v is passed through series connection...
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If the value of potential is an a.c, circuit is 10 V. Then what is the...
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