SATHEE: Electrostatics Question 218

Electrostatics Question 218

Question: The charges on two sphere are $+ 7 μ C$ and $- 5 μ C$ respectively. They experience a force F. If each of them is given and additional charge of $- 2 μ C$ , the new force of attraction will be [RPET 2002]

Options:

A) F

B) F / 2

C) $F / \sqrt{3}$

D) 2F

Show Answer

Answer:

Correct Answer: A

Solution:

$F = \frac{1}{4 π ε_{0}} \frac{(+ 7 \times 10^{- 6}) (- 5 \times 10^{- 6})}{r^{2}} = - \frac{1}{4 π ε_{0}} \frac{35 \times 10^{12}}{r^{2}} N$

$F^{'} = \frac{1}{4 π ε_{0}} \frac{(+ 5 \times 10^{- 6}) (- 7 \times 10^{- 6})}{r^{2}} = - \frac{1}{4 π ε_{0}} \frac{35 \times 10^{12}}{r^{2}} N$

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Electrostatics Question 218

Question: The charges on two sphere are+7μC and −5μC respectively. They experience a force F. If each of them is given and additional charge of −2μC , the new force of attraction will be [RPET 2002]

Options:

Answer:

Solution:

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Question: The charges on two sphere are $+ 7 μ C$ and $- 5 μ C$ respectively. They experience a force F. If each of them is given and additional charge of $- 2 μ C$ , the new force of attraction will be [RPET 2002]