Electrical Measuring Instruments | Practice MCQs Physics for Mdcat | mosaicbro.com
Electrical Measuring Instruments | Practice MCQs Physics for Mdcat
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Review Answers:
1
A moving coil galvanometer is based on the:
Correct Answer:B
Explanation:
A moving coil galvanometer operates based on the magnetic effect of current, where a current-carrying coil experiences a torque in a magnetic field.
2
A moving coil type of galvanometer is based upon the principle that:
Correct Answer:A
Explanation:
The principle involves a current-carrying wire experiencing a force in a magnetic field, which causes the coil to deflect.
3
In a moving coil galvanometer, we use a radial magnetic field so that the galvanometer scale is:
Correct Answer:C
Explanation:
A radial magnetic field ensures that the deflection is directly proportional to the current, resulting in a linear scale.
4
The coil of a sensitive moving coil galvanometer swings too far on both sides. This movement can quickly be stopped by:
Correct Answer:C
Explanation:
Shorting the coil creates eddy currents that dampen the motion, stopping the oscillations quickly.
5
The current that must flow through the coil of a galvanometer so as to produce a deflection of one division on its scale is called:
Correct Answer:B
Explanation:
Current sensitivity is defined as the current required per unit deflection.
6
The sensitivity of moving coil galvanometer depends on:
Correct Answer:C
Explanation:
The sensitivity is inversely proportional to the torsion constant of the spring.
7
The coil of a suspended coil galvanometer has very high resistance. When a momentary current is passed through the coil, it:
Correct Answer:A
Explanation:
High resistance leads to damping, causing oscillations with decreasing amplitude.