Figure of Merit of a galvanometer
 1) Why a moving coil galvanometer is called so? None of these Because the coil moves along with the magnet. Because the coil moves while the magnet remains fixed. Because the number of turns of the coil varies with current.

 2) How can you increase the sensitivity of a moving coil galvanometer? By decreasing the number of turns of the coil By increasing the area of the coil Both a and c By increasing the number of turns of the coil

 3) What is meant by the figure of merit of a galvanometer? None of these Current required to produce unit deflection on the galvanometer Voltage required to produce unit deflection on the galvanometer Maximum deflection on the galvanometer

 4) If the current through a galvanometer is, I = Kθ/NAB, then what is the sensitivity of the galvanometer? S = NAB/Kθ S = NAB/K S = K/NAB None of these

 5) What is the unit of figure of merit of a galvanometer? Ampere per division Volt Ampere per meter Ampere

 6) Choose the incorrect statement from the following. The resistance of the coil of the galvanometer is called the resistance of the galvanometer. Galvanometer deflection is proportional to the amount of current passed through it. Figure of merit of a galvanometer is the reciprocal of current sensitivity. Galvanometer has positive and negative terminals.

 7) What is the figure of merit of the galvanometer if current I produce a deflection θ in it? I/2θ Iθ I/θ I^2/θ

 8) A resistance of 900Ω is connected in series with a galvanometer of resistance 100Ω. A potential difference of 1 V produces 100 division deflections in the galvanometer. Find the figure of merit of the galvanometer? 0.5×10^-5 A/div. 10^-6 A/div. 10^-5 A/div. 2×10^-5 A/div.

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