1.

Acertain amount of current when flowing in a properly set tangent galvanometer, produces a deflection of45^(@). If the current is reduced by a factor of sqrt3, the deflection would

Answer»

decrease by `30^(@)`
increase by `30^(@)`
decrease by `15^(@)`
increase by `15^(@)`

SOLUTION :`(tantheta_(2))/(tantheta_(1))=i_(2)/i_(1)=(i_(1)//sqrt3)/i_(1)=1/sqrt3`
`implies (tantheta_(2))/(TAN45^(@))=1/sqrt3 implies tantheta_(2)=1/sqrt3= TAN30^(@)`
`implies theta_(2) = 30^(@)`
Deflection decreases by `(45^(@) -30^(@)) = 15^(@)`


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