Alternating Current questions
577 published questions with worked solutions.
- The r.m.s. value of an alternating current of 50 Hz frequency is 10A The time taken by the A.C. current in reaching from zero to...
- An alternating e.m.f,e=300 sin100 πt volt, is applied to a pure resistance of 100 Ω. The r.m.s current through the circuit is
- In a simple A.C. circuit containing resistance, current is
- The instantaneous current in a circuit is, I = ( t + ) ampere. What is the r.m.s. value of the current?
- The A.C. mains voltage supplied to flour mill is 440 volt. What maximum value does it reach?
- The rms value of alternating current of 50 Hz frequency is 10 A. The time taken by alternating current in reaching from zero to...
- A.C. voltmeter shows ......... value of alternating voltage.
- The opposition offered by an inductance to flow of A.C. current through it is
- The opposition offered by condenser to the flow of A.C. current is
- The inductive reactance of an inductor of inductance L is:
- The impedance of LCR series circuit is
- If A.C. source is connected to a resistive circuit, then
- In a purely inductive circuit, the current
- Current in a circuit is wattless, if
- With an increase in the frequency of an A.C. supply, the inductive reactance
- An A.C. of frequency f is flowing in a circuit containing a resistance R and an inductance L in series. The impedance of the...
- An A.C. of frequency f is flowing in a circuit containing a resistance R and capacitance C in series. The impedance of the...
- When the frequency of A.C. is doubled, the impedance of an RC circuit is:
- When the frequency of A.C. is doubled, the impedance of an LCR circuit is
- The reactance of a circuit is zero. It is possible that the circuit contains
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