Question

An electric dipole of length 8cm placed at an angle 40 degree with uniform electric field 2*104/1 experiences a torque of 4*10 find the dipole moment and magnitude of electric charge

Answer 1

Explanation:

Here dipole moment , p=lq=(2/100)q=0.02q

Now, torque , τ=pEsinθ

or 4=(0.02q)(2×10^ 5 )sin30

or q=200×10 ^−5C=2mC