Adipole of moment 0.5 e nm is placed in a uniform electric field with a magnitude of 8 times 104 n/c. what is the magnitude of the torque on the dipole when?
a) the dipole is parallel to the electric field.
b) the dipole is perpendicular to the electric field.
c) the dipole makes an angle of 30 degrees with the electric field.
d) find the potential energy of the dipole in the electric field for each case. theta = 0 degrees (parallel).

Answer with Explanation:

We are given that

Dipole moment=C-m

Because

Magnitude of electric field,E= N/C

a.We have to find the magnitude of torque on the dipole when

dipole is parallel to the electric field

i.e

We know that

Substitute the values then we get

Because sin 0=0

b.

By using

Nm

c.

Nm

By using

d.Potential energy, U=

Because cos 0degree=1

d is the answer i came up with

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