Question

an electric dipole of moment 2 into10to the power _8cm,is aligned in a uniform electric field of 2into 10 tothe power 4N/C calculate the workddone in rotating the dipole from 30 degree to 60 degree.

Answer 1

Explanation:

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Physics

Electric Charges and Fields

Electric Dipole

An electric dipole with dip...

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Asked on November 22, 2019 by

Suruchi Bhutto

An electric dipole with dipole moment 4×10

−9

C m is aligned at 30

∘

with the direction of a uniform electric field of magnitude 5×10

4

NC

−1

. Calculate the magnitude of the torque acting on the dipole.

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VIDEO EXPLANATION

ANSWER

Electric dipole moment, E=4×10

−9

N/C

Angle made by p with a uniform electric field, θ = 30°

Electric field, E=5×10

4

N/C

Torque acting on the dipole:

τ=pEsinθ

=4×10

−9

×5×10

4

×sin30

o

=20×10

−5

×

2

1

=10

−4

Nm

Hence, the magnitude of the torque acting on the dipole is 10

−4

N m.