Question

find the total electrostatic potential energy of a system in which two charges are placed in a uniform magnetic field​

Answer 1

Explanation:

τ

=

p

×

E

work done in rotating dipole by small angle

dw=τdθ

=−pεsinθdθ

The change in potential energy

dU=−dW=pEsinθdθ

If θ→90

o

to θ

o

U(θ)−U(90

o

)=∫

90

o

0

o

Pεsinθdθ

=Pε[−cosθ]

90

0

=−

P

.

E

So

U(θ)=−

P

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