A distribution of charges is held fixed by rigid insulators as shown in figure. A charge Q at (–a, 0, 0) and at (a, 0, 0) and a charge – 2Q at (0, 0, 0). Which of the following electric fields will cause a net torque to be exerted on the system of charges.

Engineering

Physics

Electric Field and Gauss Law

Question

$\vec{E}$ = (constant) $\hat{j}$

$\vec{E}$ = E₀ |x| $\hat{i}$

$\vec{E}$ = (E₀x + constant) $\hat{i}$

$\vec{E}$ = (E₀x + constant) $\hat{k}$

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