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The equation of A.C. voltage is given by...

The equation of A.C. voltage is given by V = 158 sin 200`pi`t. The value of voltage at time `t =1/400` sec is …... V.

A

`-79`

B

`79`

C

`-158`

D

`158`

Text Solution

Verified by Experts

The correct Answer is:
D
In V=158 sin 200`pit` put `t=1/400`
`therefore V=158 sin 200pixx1/400`
`therefore V=158 sin (pi/2)`
`therefore` V=158 Volt [`because "sin" pi/2 =1`]
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