A galvanometer can be used as a voltmeter by connecting

Answer

(i) `(u)/(2), (m u)/(2)` (ii) `(usqrt3)/(8), (m u sqrt13)/(8)` (iii) `(usqrt3)/(4), (m u sqrt3)/(4)`

Explanation

(a) `m u - T Deltat = mv` …..(i)
`T Deltat = mv` …..(ii)
On solving eq. (i) & (ii)

(b) `(2l)/(sin 120^(@)) = (l)/(sin theta)`
`sin theta = (sqrt3)/(4), cos theta = (sqrt13)/(4)`
`m u cos theta - T Deltat = mv` ...(i)
`rArr T Deltat = mv` ...(ii)
On solving eq. (i) & (ii) `(u cos theta)/(2) = v`

(c ) `2l cos theta = l rArr theta = 60^(@)`
`m u cos 30^(@) - T Deltat = mv` ...(i)
`T Deltat = (m u sqrt3)/(4)` ....(ii)