A Wheatstone bridge requires a change of 7 Ω in the un

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Technical

38

M: +2.00/-0.66

A Wheatstone bridge requires a change of 7 Ω in the unknown resistance arm of the bridge to produce a change in deflection of 3 mm of the galvanometer. The sensitivity and the deflection factor will be nearly

[ESE 2019 Paper 2 (Technical) ECE]

A 0.23 mm/Ω and 2.3 Ω/mm

B 0.43 mm/Ω and 2.3 Ω/mm

C 0.23 mm/Ω and 1.3 Ω/mm

D 0.43 mm/Ω and 1.3 Ω/mm