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An electric charge 10^(-8) C is placed ...

An electric charge ` 10^(-8) C` is placed at the point `(4 m, 7m, 2m)`. At the point `( lm, 3m, 2m,)`, the electric.

A

potential will be `18 V`

B

field has no Y-component

C

field will be along Z-axis

D

potential will be `1.8 V`

Text Solution

Verified by Experts

The correct Answer is:
A
` r=sqrt ( (1-4)^2 + (3-7)^2 + (2-2)^2 ) =5` and
` V_(1m, 3m, 2m) = (Kq)/r = 18V`
`B` electroc field
` vec E = (Kq)/r^3 vec r_(AP)`

`= (9 xx 10^9 xx 10^(-8))/((5)^3) ((1-4) hat I + (3 -1) hat j + (2-2) hatk)`
` = (90)/((5)^3) (-3 hat i + 2 hat j)`.
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