An electric dipole consisting of two opposite charges of `2xx10^(-6)C` each separated by a distance of `3 cm` is placed in an electirc field of `2xx10^(5)N//C`. The maximum torque on the dipole is will be

Options

A. `12 xx 10^(-1) N - m`
B. `12 xx 10 ^(-2) N - m`
C. `12 xx 10^(-3) N - m`
D. `12 xx 10^(-4) N - m `

Answer

C

Explanation

Charges `(q) = 2 xx 10 ^(-6) C`, Distance ` (d) = 3 cm = 3 xx 10^(-2)` m and electric field `(E) = 2 xx 10^(5) N//C ` . Torque `(tau) = q . d. E = (2 xx 10^(-6)) xx ( 3 xx 10^(-2)) xx ( 2 xx 10^(5)) = 12 xx 10 ^(-3) N - m `