SATHEE: Electrostatics Question 220

Electrostatics Question 220

Question: Two point charges $3 \times 1 0^{6} C$ and $8 \times 1 0^{6} C$ repel each other by a force of $6 \times 1 0^{3} N$ . If each of them is given an additional charge $6 \times 1 0^{6} C$ , the force between them will be [DPMT 2003]

Options:

A) $2.4 \times 1 0^{3} N$ (attractive)

B) $2.4 \times 1 0^{9} N$ (attractive)

C) $1.5 \times 1 0^{3} N$ (repulsive)

D) $1.5 \times 1 0^{3} N$ (attractive)

Show Answer

Answer:

Correct Answer: D

Solution:

$F \propto Q_{1} Q_{2}$

therefore

$\frac{F_{1}}{F_{2}} = \frac{Q_{1} Q_{2}}{Q_{1} ‘ Q_{2}^{'}}$

$= \frac{3 \times 10^{- 6} \times 8 \times 10^{- 6}}{(3 \times 10^{- 6} - 6 \times 10^{- 6}) (8 \times 10^{- 6} - 6 \times 10^{- 6})} = \frac{3 \times 8}{- 3 \times 2} = - \frac{4}{1}$ therefore $F_{2} = - \frac{F_{1}}{4} = - \frac{6 \times 10^{- 3}}{4} = - 1.5 \times 10^{- 3} N$ (Attractive)

Electrostatics Question 220

Question: Two point charges $3 \times 1 0^{6} C$ and $8 \times 1 0^{6} C$ repel each other by a force of $6 \times 1 0^{3} N$ . If each of them is given an additional charge $6 \times 1 0^{6} C$ , the force between them will be [DPMT 2003]

Options:

Answer:

Solution:

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Electrostatics Question 220

Question: Two point charges 3×106C and 8×106C repel each other by a force of 6×103N . If each of them is given an additional charge 6×106C , the force between them will be [DPMT 2003]

Options:

Answer:

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

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Question: Two point charges $3 \times 1 0^{6} C$ and $8 \times 1 0^{6} C$ repel each other by a force of $6 \times 1 0^{3} N$ . If each of them is given an additional charge $6 \times 1 0^{6} C$ , the force between them will be [DPMT 2003]