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Measurements and Instrumentation - Engineering

Q1:

The deflection of a DArsonval galvanometer is measured through a mirror and scale. The mirror is 1 m away from the light source. The mirror is mounted on, the moving system. If mirror rotates through 0.2 rad the displacement on the scale is

A 0.2 m

B 0.4 m

C 0.1 m

D 0.05 m

ANS:B - 0.4 m

Diplacement = (1) (2θ) = 0.4 m.