The potential difference across the `100 Omega` resistance in the following circuit is measured by a voltmeter of `900 Omega` resistance. The percentage error made in reading the potential difference is

Answer

`(5v)/(R cos theta)`

Explanation

Let `v =` velocity of wege and `u =` velocity of particle relative to wedge

COLM
`rArr m (v + u cos theta) + 4 mv = 0`
`rArr u cos theta = -5v, omega = (u)/(R ) = (5v)/(R cos theta)`