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NEET & JEE · Physics · Class 12

Electrostatic Potential and Capacitance — NEET Physics MCQs

30 questions written by hand against the NCERT chapter. Every wrong option is explained, not just the right one.

30questions
10/14/6easy / medium / hard
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Sample questions from this chapter

With potential chosen as zero at infinity, what is electrostatic potential at a point?
  1. External work per unit positive test charge brought slowly from infinity ✓
  2. Electric force on a unit negative charge
  3. Work done per unit source charge in a closed path
  4. Electric-field magnitude multiplied by distance for every field
Answer: A. Potential is the limiting external work per unit positive test charge brought without acceleration from infinity.
Why not B: Potential is defined using a positive test charge and is a scalar.
Why not C: Electrostatic work around a closed path is zero and does not define local potential.
Why not D: The product Ed equals potential difference only for suitable displacement in a uniform field.
Using k=9.00×10⁹ N m² C⁻², what is the potential 0.300 m from a +2.00 μC point charge?
  1. 2.00×10⁵ V
  2. 5.40×10³ V
  3. 6.00×10⁴ V ✓
  4. 1.80×10⁴ V
Answer: C. V=kQ/r=(9.00×10⁹)(2.00×10⁻⁶)/0.300=6.00×10⁴ V.
Why not A: This divides kQ by r², using field-like distance dependence.
Why not B: This multiplies kQ by 0.300 m instead of dividing by it.
Why not D: This is kQ before the required division by distance.
How much energy is stored in a 12.0 pF capacitor connected across 50.0 V?
  1. 1.50×10⁻⁸ J ✓
  2. 3.00×10⁻⁸ J
  3. 6.00×10⁻¹⁰ J
  4. 1.50×10⁻⁵ J
Answer: A. U=CV²/2=(12.0×10⁻¹²)(50.0)²/2=1.50×10⁻⁸ J.
Why not B: This uses CV² and omits the one-half charging factor.
Why not C: This uses a value forty times smaller than CV²/2.
Why not D: This treats picofarads as nanofarads, introducing a factor of one thousand.

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Read the chapter first

Every NCERT question in this chapter is solved, free: NCERT solutions — Electrostatic Potential and Capacitance →

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Questions

How many NEET questions are there on Electrostatic Potential and Capacitance?

This chapter test has 30 questions — 10 easy, 14 medium and 6 hard — all written against the NCERT Class 12 chapter.

Is this NEET Physics chapter test free?

Yes. Every chapter test is free with no login, and you get your all-India rank on every one. Nothing on the site is on sale right now.

Do the questions explain the wrong options?

Yes — every distractor carries its own explanation naming the specific misconception that makes a student pick it. That is the part most question banks skip, and it is the part that changes your next attempt.