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Figure of Merit of a Galvanometer Video Lecture | Physics Class 12 - NEET

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FAQs on Figure of Merit of a Galvanometer Video Lecture - Physics Class 12 - NEET

1. What is the figure of merit of a galvanometer?
Ans. The figure of merit of a galvanometer is a measure of its sensitivity and is defined as the current required to produce a unit deflection on the galvanometer scale.
2. How is the figure of merit of a galvanometer calculated?
Ans. The figure of merit of a galvanometer can be calculated by dividing the full-scale current of the galvanometer by the angular deflection corresponding to that current. It is typically expressed in units of ampere per degree or ampere per radian.
3. Why is the figure of merit important in galvanometers?
Ans. The figure of merit is important in galvanometers as it provides an indication of the sensitivity of the instrument. A higher figure of merit implies that the galvanometer can detect smaller currents, making it more sensitive.
4. How does the figure of merit affect the accuracy of a galvanometer?
Ans. The figure of merit directly affects the accuracy of a galvanometer. A higher figure of merit means that smaller currents can be detected with higher precision, leading to a more accurate measurement of the current flowing through the galvanometer.
5. Can the figure of merit of a galvanometer be increased?
Ans. Yes, the figure of merit of a galvanometer can be increased by reducing the resistance of the galvanometer coil. This reduces the internal resistance of the galvanometer, allowing a larger current to flow for a given voltage and increasing the sensitivity of the instrument.
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