WBJEE · Physics · Electrostatics
Consider a positively charged infinite cylinder with uniform volume charge density \(r > 0\). An electric dipole consisting of \(+Q\) and \(-Q\) charges attached to opposite ends of a massless rod is oriented as shown in the figure. At the instant as shown in the figure, the dipole will experience,
- A a force to the left and no torque
- B a force to the right and a clockwise torque
- C a force to the right and a counter clockwise torque
- D non froce but only a clockwise torque
Answer & Solution
Correct Answer
(B) a force to the right and a clockwise torque
Step-by-step Solution
Detailed explanation
Hint : \(E \propto \frac{1}{r}\) \(\begin{aligned} & \mathrm{F}_1 > \mathrm{F}_2 \\ & \therefore \quad \mathrm{F}_{\text {net }} \text { towards right } \tau_{\text {net }} \text { clockwise. }\end{aligned}\)
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