Electrical Measuring Instruments | Practice MCQs Physics for Mdcat | mosaicbro.com
Electrical Measuring Instruments | Practice MCQs Physics for Mdcat
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Review Answers:
57
When current flows in a rectangular coil placed in a magnetic field experiences:
Correct Answer:A
Explanation:
The coil experiences a torque due to the interaction between the current and the magnetic field.
58
The working of all electrical instruments depend upon:
Correct Answer:A
Explanation:
Most electrical instruments rely on the magnetic effect of current for operation.
59
The current passing through coil of galvanometer is:
Correct Answer:A
Explanation:
The deflection angle is proportional to the current in a moving coil galvanometer.
60
A galvanometer is used:
Correct Answer:D
Explanation:
A galvanometer detects small currents but requires modifications (e.g., shunts or series resistors) to measure voltage, current, or resistance directly.
61
Which of the following is used to measure current, voltage and resistance:
Correct Answer:C
Explanation:
An avometer (multimeter) can measure current, voltage, and resistance.
62
The sensitivity of moving coil galvanometer can be increased by:
Correct Answer:C
Explanation:
A stronger magnetic field increases the torque on the coil, enhancing sensitivity.
63
Voltmeter is used to measure the:
Correct Answer:D
Explanation:
Voltmeters are designed to measure voltage or potential difference.