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The equation of straight line shown in f...

The equation of straight line shown in figure is :

A

`100 Vm^(-1)` along X-axis

B

`100 Vm^(-1)` along Y-axis

C

`200 Vm^(-1)` at an angle `120^@` with X-axis

D

`50 Vm^(-1)` at an angle `120^@` with X-axis

Text Solution

Verified by Experts

The correct Answer is:
C
`dV = - vecE.dvecr`
`implies DeltaV =-E.Dletar cos theta`

`implies E=(-DeltaV)/(DeltarCos theta)=(-(20-10))/(10 xx10^(-2)cos 120^@)`
`implies E=(-10)/(10 xx10^(-2) xx((-1)/2))=200 V//m`
200V /m at an angle `120^@` with X-axis.
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