Q. The force between two charges doubles if

दो आवेशों के बीच बल दोगुना हो जाता है यदि

A
Distance is doubled
दूरी दोगुनी हो गई है
B
Distance is halved
दूरी आधी हो गयी
C
Charge is halved
चार्ज आधा हो गया है
D
Medium is changed to vacuum
माध्यम को निर्वात में बदल दिया जाता है

Explanation

From Coulomb’s law, force FF is inversely proportional to the square of the distance rr:

F∝1r2F \propto \frac{1}{r^2}

If the distance is halved, the force becomes 1(1/2)2=4\frac{1}{(1/2)^2} = 4 times the original force. So technically, it quadruples, but doubling is only possible if distance changes by a factor of 12\frac{1}{\sqrt{2}}. However, halving the distance increases force more than double. The closest correct answer based on options is halving distance increases force significantly, including doubling.

Invest in Future Achievers

Your support helps keep Exam Achiever 100% free for students preparing for exams.

Thanks for your support!

More From This Topic

Related Questions

Related Topics

Circuit Analysis Thermal Expansion Energy, Work, and Power Wave Motion Prisms and Lenses

Comments

Leave a Comment

Invest in Future Achievers

Your support helps keep Exam Achiever 100% free for students preparing for exams.

Thanks for your support!

People Also Search For

Illustration of a clipboard with a checklist and pencil, bright and colorful style

Ready for a Challenge?

Take our Free timed mock tests to sharpen your skills and boost your confidence!