SATHEE: Electrostatics Question 171

Electrostatics Question 171

Question: Two small spheres each having the charge $+ Q$ are suspended by insulating threads of length $L$ from a hook. This arrangement is taken in space where there is no gravitational effect, then the angle between the two suspensions and the tension in each will be [IIT 1986]

Options:

A) $180^{o}, \frac{1}{4 π ε_{0}} \frac{Q^{2}}{{(2 L)}^{2}}$

B) $90^{o}, \frac{1}{4 π ε_{0}} \frac{Q^{2}}{L^{2}}$

C) $180^{o}, \frac{1}{4 π ε_{0}} \frac{Q^{2}}{2 L^{2}}$

D) $180^{o}, \frac{1}{4 π ε_{0}} \frac{Q^{2}}{L^{2}}$

Show Answer

Answer:

Correct Answer: A

Solution:

(a) The position of the balls in the satellite will become as shown below .

Thus angle q = 180° and Force $= \frac{1}{4 π ε_{0}} \cdot \frac{Q^{2}}{{(2 L)}^{2}}$

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Electrostatics Question 171

Question: Two small spheres each having the charge +Q are suspended by insulating threads of length L from a hook. This arrangement is taken in space where there is no gravitational effect, then the angle between the two suspensions and the tension in each will be [IIT 1986]

Options:

Answer:

Solution:

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Question: Two small spheres each having the charge $+ Q$ are suspended by insulating threads of length $L$ from a hook. This arrangement is taken in space where there is no gravitational effect, then the angle between the two suspensions and the tension in each will be [IIT 1986]