If an insulting material called dielectric is introduced between the plates, the capacitance of capacitor is:
Correct answer: B. The capacitance increases
- A. The capacitance decreases
- B. The capacitance increases
- C. The capacitance remains the same
- D. The capacitance becomes zero
Explanation
Introducing a dielectric between the plates of a capacitor increases the capacitance. This is because a dielectric reduces the electric field within the capacitor, which allows it to store more charge for the same voltage. Therefore, Option B is correct. Option A is incorrect because the capacitance does not decrease; it increases. Option C is incorrect as the capacitance does not remain the same; it changes. Option D is incorrect because the capacitance does not become zero; it actually increases.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Electrostatics
Electrostatics describes forces between charges through Coulomb's law, electric fields and field intensity, then uses electric potential to measure energy per unit charge. Capacitors store charge and electrical energy, with capacitance depending on geometry and dielectric material, not simply on the amount of charge present.
Practise Electrostatics
831 free Electrostatics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Electrostatics questions
The space between the plates of a capacitor is filled by a electric constant K. The capacitance of the capacitor
The capacity of a condensor in which dielectric of dielectric constant 5 has been used, is C. If the dielectric is replaced by another with dielectric constant 20, the capacity will become
What is the area of the plates of a 3F parallel plate capacitor, if the seperation between the plates is 5mm?
If the sheet of the backlite is inserted between the plates of an air capacitor, the capacitance will :
An electric material must be:
A capacitance of a capacitor is not affected by: