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Moving Charges And Magnetism

Question
CBSEENPH12037623
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Give two factors by which the current sensitivity / voltage sensitivity of a moving coil galvanometer can be increased.

Solution

Current sensitivity or voltage sensitivity of a moving coil galvanometer can be increased by :

(i) Increasing the number of turns in the galvanometer coil.
(ii) Decreasing the torsion constant of the suspension fibre.

Some More Questions From Moving Charges And Magnetism Chapter

Two moving coil meters, M1 and M2 have the following particulars:
R1 = 10 Ω   N1 = 30,
A1 = 3.6 x 10–3 m2,  B1 = 0.25 T
R2 = 14 Ω;  N2 = 42,
A2 = 1.8 x 10–3 m2, B2 = 0.50 T
(The spring constants k are identical for the two meters).
Determine the ratio of (a) current sensitivity and (b) voltage sensitivity of M2 and M1.

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