Question

46. A small electric dipole is placed at origin with
its dipole moment directed along positive x-axis. The
direction of electric field at point (2,22,0) is
1)
4) 4 x 10
3) 3 x 10-3Nm
1) Along positive x-axis
2) Along positive y-axis
3) Along negative y-axis
4) Along negative x-axis
placed​

Answer 1

Explanation:

The electric field due to a dipole at any point in space is given by,

E=1/(4πϵ

0

r

3

)(3(

p

.

r

^

)

r

^

−

p

)

r=2

i

^

+2

2

j

^

⇒

r

^

=1/

3

i

^

+

3

2

j

^

E=1/(4πϵ

0

r

3

)(

3

p

r

^

−p

i

^

)

The i component cancels out leaving only the j component.

Answer 2

Answer:

answer is 2) along positive y-axis