Physics MCQs for NET, IAS, State-SET (KSET, WBSET, MPSET, etc.), GATE, CUET, Olympiads etc. Part 3
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Question:
In a purely inductive circuit the current.
- Is in phase with the voltage.
- Is out of phase with the voltage.
- Eads the voltage by 900.
- Lags behind the voltage by 900.
Question:
A lamp is connected in a series with a capacitor and an AC source, what happens if the capacity of the capacitor is reduced?
- The lamp shines more brightly.
- The lamp shines less brightly.
- There is no change in the brightness of the lamp.
- Brightness may increase or decrease depending on the frequency of AC.
Question:
A transformer is a device which converts.
- Low voltage low current into high voltage high current.
- High voltage low current into low voltage high current.
- High voltage high current into low voltage low current.
- Electric power into mechanical power.
Question:
The resonant frequency of an LC circuit is.
Question:
If the conductance and capacitance are both doubled in LCR circuit, the resonant frequency of the circuit will
- Decrease to one half the original value.
- Decrease to one-fourth the original value.
- Increase to twice the original value.
- Decrease to twice the original value.
Question:
The power factor In an LCR circuit at resonance is
Question:
The power factor in a circuit is unity. Then the impedance of the circuit is
- Inductive.
- Capertive.
- Partially inductive and partially conductive.
- Resistive.
Question:
One complete set of negative and positive values of alternating quantities is called.
- Time period.
- Amplitude.
- Frequency.
- Cycle.