InterviewSolution
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InterviewSolution
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A certain amount of current when flowing in a properly set tangent galvanoment, produces a deflection of `45^(@)`. If the current be reduced by a factor of `sqrt(3)`, the deflection wouldA. Decrease by `30^(@)`B. Decrease by `15^(@)`C. Increase by `15^(@)`D. Increase by `30^(@)` |
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Answer» Correct Answer - B In tangent galvanometer, `I prop tan theta` :. `I_(1)/I_(2)=(tantheta_(1))/(tantheta_(2)) impliesI_(1)/(I_(1)//sqrt(3))=(tan 45^(@))/(tantheta_(2))` `implies sqrt(3)tantheta_(2)=1 implies tantheta_(2)= 1/sqrt(3) implies theta_(2)=30^(@)` So deflection will decrease by `45^(@)-30^(@)=15^(@)` |
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