Question

13. An electric dipole is made up of equal and opposite charges separated by 2
x 102m. The dipole is placed in a uniform electric field of 10 N/C. If the
maximum torque experienced by the dipole is 2 x 10- Nm, what are the
charges on the dipole? l
pls fast ​

Answer 1

Answer :

charges on the dipole =0.02C

Explanation :

dipole moment = p = q × d = q×100

where, p = magnitude of a charge

d = distance between opposite charges

T = p × E = p × E × Sin(α)

Where T = torque and E = Electric Field

α = Angle between p and E.

Given,

T = 2× 10 Nm , E = 10N/C, d = 10^2 m = 100m.

For maximum torque , α = 90 degree i.e electric field must be perpendicular to dipole. So,

T = p × E

2× 10 = (q × 100) × 10

q = 20/1000 = 0.02C

q = 0.02C