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An electric dipole of moment overset( r ...

An electric dipole of moment `overset( r ) (p) = (hat(i) + 2hat ( j )) xx10^(-28) Cm` is at origin. The electric field at point ( 2,4) due to the dipole is parallelto

A

`hat(i) +2 hat( j) `

B

`2hat(i )+hat( j )`

C

`hat( i)-2hat(j)`

D

`2 hat(i)-hat(j)`

Text Solution

Verified by Experts

As ( 2,4) lies on axis of dipole
`rArr overset( r )( E ) =(2KP)/( r^(3)) =(2 xx 9 xx 10^(9)xx( hat(i)+ 2 hat(j))xx 10^(-28))/((2 ^(2) +4^(2))^(3//2) ) rArr overset(1) ( E ) || ( hat(i) + 2 hat(j))`
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