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When air is replaced by a dielectric medium offorce constant K, the maximum force ofattraction between two charges, separated by adistance [1999]
- a)decreases K-times
- b)increases K-times
- c)remains unchanged
- d)becomes 1/K2 times
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
When air is replaced by a dielectric medium offorce constant K, the ma...
in air
Most Upvoted Answer
When air is replaced by a dielectric medium offorce constant K, the ma...
Dielectric medium and force of attraction between charges
Dielectric medium is a non-conducting substance that can be polarized by an electric field. When a dielectric medium is placed between two charges, it reduces the force of attraction between them.
Explanation of the answer
The force of attraction between two charges is given by Coulomb's law, which states that the force is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.
F ∝ q1q2 / r^2
When a dielectric medium of force constant K is inserted between the charges, it polarizes the medium and creates an electric field that opposes the external field of the charges. This reduces the effective electric field between the charges, which in turn reduces the force of attraction between them.
The force of attraction between the charges in a dielectric medium is given by:
F = (1 / 4πεK) * q1q2 / r^2
where ε is the permittivity of the medium.
Comparing this with Coulomb's law, we can see that the force of attraction is reduced by a factor of K.
F / F0 = (1 / 4πεK) * q1q2 / r^2 * r^2 / q1q2
F / F0 = 1 / K
where F0 is the force of attraction between the charges in air.
Therefore, the maximum force of attraction between two charges, separated by a distance, decreases K-times when air is replaced by a dielectric medium of force constant K.
Conclusion
The insertion of a dielectric medium between two charges reduces the force of attraction between them by a factor of K. This is because the medium polarizes and creates an opposing electric field that reduces the effective electric field between the charges.
Dielectric medium is a non-conducting substance that can be polarized by an electric field. When a dielectric medium is placed between two charges, it reduces the force of attraction between them.
Explanation of the answer
The force of attraction between two charges is given by Coulomb's law, which states that the force is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.
F ∝ q1q2 / r^2
When a dielectric medium of force constant K is inserted between the charges, it polarizes the medium and creates an electric field that opposes the external field of the charges. This reduces the effective electric field between the charges, which in turn reduces the force of attraction between them.
The force of attraction between the charges in a dielectric medium is given by:
F = (1 / 4πεK) * q1q2 / r^2
where ε is the permittivity of the medium.
Comparing this with Coulomb's law, we can see that the force of attraction is reduced by a factor of K.
F / F0 = (1 / 4πεK) * q1q2 / r^2 * r^2 / q1q2
F / F0 = 1 / K
where F0 is the force of attraction between the charges in air.
Therefore, the maximum force of attraction between two charges, separated by a distance, decreases K-times when air is replaced by a dielectric medium of force constant K.
Conclusion
The insertion of a dielectric medium between two charges reduces the force of attraction between them by a factor of K. This is because the medium polarizes and creates an opposing electric field that reduces the effective electric field between the charges.
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When air is replaced by a dielectric medium offorce constant K, the maximum force ofattraction between two charges, separated by adistance [1999]a)decreases K-timesb)increases K-timesc)remains unchangedd)becomes 1/K2timesCorrect answer is option 'A'. Can you explain this answer? for Class 12 2026 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about When air is replaced by a dielectric medium offorce constant K, the maximum force ofattraction between two charges, separated by adistance [1999]a)decreases K-timesb)increases K-timesc)remains unchangedd)becomes 1/K2timesCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 12 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for When air is replaced by a dielectric medium offorce constant K, the maximum force ofattraction between two charges, separated by adistance [1999]a)decreases K-timesb)increases K-timesc)remains unchangedd)becomes 1/K2timesCorrect answer is option 'A'. Can you explain this answer?.
When air is replaced by a dielectric medium offorce constant K, the maximum force ofattraction between two charges, separated by adistance [1999]a)decreases K-timesb)increases K-timesc)remains unchangedd)becomes 1/K2timesCorrect answer is option 'A'. Can you explain this answer? for Class 12 2026 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about When air is replaced by a dielectric medium offorce constant K, the maximum force ofattraction between two charges, separated by adistance [1999]a)decreases K-timesb)increases K-timesc)remains unchangedd)becomes 1/K2timesCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 12 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for When air is replaced by a dielectric medium offorce constant K, the maximum force ofattraction between two charges, separated by adistance [1999]a)decreases K-timesb)increases K-timesc)remains unchangedd)becomes 1/K2timesCorrect answer is option 'A'. Can you explain this answer?.
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