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class 12 physics Chapter 12: Electrostatics MCQs With Explanations

Practice class 12 physics Chapter 12: Electrostatics MCQs with explanations for Pakistani board exams. Includes solved objective questions, answer checking, chapter revision guidance and next chapter suggestions.

MCQs / class 12 / physics / Chapter 12: Electrostatics
10 MCQs

Chapter 12: Electrostatics Objective Preparation

Use this page for direct chapter practice, answer checking and explanation review. It is available through the clean URL shown in the browser, so students can bookmark and share this exact chapter.

10Total MCQs
10With explanations
1Topics represented

Topics found: Electrostatics

Electrostatics MCQs With Explanations

Q1. Millikan and Fletcher could find the charge on oil droplets in:
Oil droplets were observed in mechanical equilibrium when the electric force balanced the gravitational force, allowing charge calculation.
Q2. The unit sec/ohm is equivalent to:
Capacitance C = Q/V, and since V = IR and Q = It, then C = t/R, so seconds per ohm equals farad.
Q3. SI unit of Coulomb constant is:
Coulomb's constant k = 1/(4πε₀) has units derived from F = k(q₁q₂)/r², yielding N m² C⁻².
Q4. If the distance between two point charges is doubled, then force between them becomes:
Coulomb's law states force is inversely proportional to the square of distance; doubling distance reduces force to one-fourth.
Q5. The value of maximum electric flux is obtained when angle between E and A is:
Electric flux is maximum when the electric field is perpendicular to the surface, i.e., when the angle between E and A is 0°.
Q6. If potential difference between plates of parallel plate capacitor is doubled, then energy stored will:
Energy stored in a capacitor is U = ½CV²; doubling V increases U by a factor of four since energy is proportional to the square of voltage.
Q7. The force on an electron in a field of 1.8 × 10⁸ N/C is:
Force on a charge is F = qE. Using q = 1.6 × 10⁻¹⁹ C and E = 1.8 × 10⁸ N/C, F = (1.6 × 10⁻¹⁹)(1.8 × 10⁸) = 2.88 × 10⁻¹¹ N.
Q8. The unit of electric field intensity other than N/C is:
Electric field can be expressed as volts per meter (V/m), which is equivalent to newtons per coulomb (N/C).
Q9. The term RC has same unit as that of:
Resistance (R) in ohms times capacitance (C) in farads yields seconds, the unit of time.
Q10. SI unit of energy density of electric field is:
Energy density is energy per unit volume, so its SI unit is joules per cubic meter (J/m³).

After Chapter 12: Electrostatics, Practice Next Chapters

Once you finish these MCQs, continue with the next available chapters from physics so your revision stays chapter-wise and complete.

Chapter 12: Electrostatics Revision Guide

Complete the MCQs first, then review every incorrect answer against the textbook heading where that concept appears. For biology and other science subjects, pay attention to terminology, diagrams, sequence of processes, examples and differences between similar structures or functions.

This chapter page keeps the exact class, subject, chapter, question count, answer checking, explanations and follow-up chapters together, so students can revise from one focused URL instead of searching through the full book again.

class 12 Physics MCQ Preparation: Electrostatics

This page supports Intermediate Part 2 practice in Physics. At this stage, the main purpose is consolidating advanced concepts while balancing board revision, college assessments and admission preparation. The questions available here should be used with the current textbook and the instructions issued by the learner's school or examination board.

What Physics MCQs can test

In Physics, objective questions commonly draw on definitions, physical quantities, SI units, laws, graphs, diagrams, formulas and the interpretation of numerical situations. A useful answer is based on the exact wording and concept, not simply on recognising a familiar option. For this subject, learners should write the known quantities and units before choosing a formula, and distinguish a law from the example used to demonstrate it.

Electrostatics: what to focus on

Definitions, diagrams, measurable quantities, component behavior and relationships between changing physical conditions.

Label the relevant diagram or circuit and explain what changes, what remains constant and why before selecting an answer.

Common mistakes for class 12 learners

In this subject, frequent errors include mixing scalar and vector quantities, overlooking units, reversing cause and effect, or choosing a familiar formula without checking its conditions. Pay special attention to links between earlier intermediate concepts and the more advanced applications introduced in the final year. When the page marks an answer as incorrect, the next step should be to identify the mistaken idea and verify it, rather than memorising the displayed answer letter.

A practical revision routine

Use mixed recall and application questions, then revisit the chapters where formulas, processes or closely related terms are confused. Before attempting the MCQs, review definitions, symbols, unit conversions, graph shapes, diagram labels and the meaning of each term in a formula. Complete a manageable set without notes, check the result, and divide errors into missing knowledge, misunderstood concepts and careless reading. Revise the appropriate section before repeating the chapter.

How to review Electrostatics after the quiz

List the questions you missed from Electrostatics and write the textbook heading connected with each one. Explain the correct idea in your own words, then return later and answer a fresh set. This gives the chapter page a clear purpose: finding specific weaknesses in Physics rather than only collecting a score.

Accuracy and responsible use

Explanations are provided where they exist in the question bank, but educational databases can contain incomplete or mistaken material. Confirm disputed answers with an authoritative textbook or teacher. Ahmad Learning Hub provides a practice resource and does not claim that a question will appear in an examination or that every available item represents an official board question.