Physics MCQs for NET, IAS, State-SET (KSET, WBSET, MPSET, etc.), GATE, CUET, Olympiads etc. Part 2
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Question:
In a step-down transformer, the number of turns in
- Primary are less
- Primary are more
- Primary and secondary equal
- Secondary are infinite
Question:
In AC circuits choke is preferred to resistors because.
- Choke coil is cheap
- Voltage increases
- Energy is not wasted
- Current increases
Question:
A choke is used as resistance in
- AC circuits.
- DC circuits.
- Half-wave rectifier circuits.
- Both AC and DC circuits.
Question:
The frequency of AC mains in India is
Question:
A transformer works on
- DC only.
- AC only.
- Both AC and DC.
- High voltage only.
Question:
Alternating voltage
- Is independent of time.
- Varies directly with time.
- Varies inversely with time.
- Varies sinusoidally with time.
Question:
The law of electromagnetic induction have been used in the construction of
- Electric operator.
- Electric motor.
- Galvanometer.
- None of the above.
Question:
Power consumed in an AC circuit become zero if
- Inductance and resistance are both high.
- Inductance and resistance are both low.
- Inductance very high and resistance negligible.
- Inductance low and resistance high.
Question:
The rms value of current is