Team Quanta gladly presents all possible short questions of Electricity & Magnetism – II’s Chapter#02: Alternative Current Circuits.
Q.1 Why is it useful to use the r.m.s notation for AC and voltages?
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Q.2 Why would power distributed systems be less effective without AC?
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Q.3 Could the alternating current resistance of a device depend upon the frequency?
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Q.4 What is the relation between AC voltage and AC current through resistor, capacitor and inductor?
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Q.5 What are the conditions for representing AC voltage or current by phasor diagram?
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Q.6 Discuss in your own words what it means to say that an alternating current leads or lags an alternating e.m.f.
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Q.7 How could you determine in a series RLC circuit, whether the frequency of an applied e.m.f is above or below resonance.
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Q.8 Can instantaneous power of a source of alternating current ever be negative. Can power factor ever be negative. If so explain meaning of these negative values.
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Q.9 In a series RLC circuit the e.m.f leads the current for a particular frequency of operation. You now lower the frequency slightly. Does the total impedance of the circuit increases-decreases or stay constant.
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Q.10 Why is it useful to use r.m.s notations for alternating currents and voltages.
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Q.11 Define resonance frequency.
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Q.12 Does the resonance frequency depend upon the resistance of the circuit.
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Q.13 Define power factor and average power.
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Q.14 How does doubling the frequency affect the capacitive reactance and inductive reactance.
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Q.15 Define r.m.s value and power factor in AC circuit.
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