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To find the resistance of a galvanometer...

To find the resistance of a galvanometer by the half deflection method the following circuit is used with resistances `R_1 =9970 Omega , R_2 = 30 Omega and R_3 = 0`. The deflection in the galvanometer is d. With `R_3, =107 Omega ` the deflection changed to `(d) /(2)` the galvanometer resistance is approximately:

A

`107 Omega `

B

`137 Omega `

C

`107 // 2 Omega `

D

`77 Omega `

Text Solution

Verified by Experts

The correct Answer is:
D
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AAKASH SERIES-APPENDICES ( REVISION EXERCISE )-REVISION EXERCISE (MOVING CHANGES & MEGNETISM)
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