Alternating Current questions
577 published questions with worked solutions.
- A transformer has 100 turns in the primary and 500 turns in the secondary if the primary is connected to 220 V D.C supply then...
- In a step up transformer, the input voltage is 300 V and the output voltage is 15kV.then the ratio of the number of turns in the...
- The number of turns in the primary coil of a transformer is 1000. A power of 2 kW is fed to it by a current of 0.1A.The number of...
- two coils i.e. primary and secondary in an ideal transformer have one of the following constant or the same is
- A transformer which
- In a transformer 220 A.C. voltages is increased to 2200 volt. If number of turns in secondary are 2000 then number of turns in...
- The primary of transformer has 100 turns and secondary winding has 200 turns. the primary is connected to an AC supply of 120 V...
- The number of turns in primary and secondary turns of transformer are 1000 and 3000 respectively .if 80 volts a.c.is supplied to...
- A step down transformer is used to reduce 220 V supply to 11 V. The primary draws 5A of current while secondary 90A.the...
- In a transformer, the number of turns of primary coil and secondary coil are 5 and 4 respectively if 240 V is applied on a...
- The alternating current of equivalent value of I_0/ 2 is
- The peak value of the a.c. current flowing throw a resister is given by
- D.C. ammeter is connected in a circuit through which a a.c.e mf of 50 Hz is flowing. The ammeter will read
- The r.m.s. value of an alternating current is
- A voltmeter reads V volts in an A.C. circuit then V is
- The measuring instrument used for alternating current / emf value, measures its
- In an A. C. circuit , I_ rms and I_0 are related as
- If an A.C. ammeter reads I A in an A.C. circuit, then the peak value of the current is
- The peak value of alternating voltage is 423 V. Its root mean square value is
- A generator produces an e.m.f of e=240 sin120 t volt, where t is in seconds. The frequency and r.m.s voltage are
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