Ohm’s Law and Resistance MCQs

Prepare for Ohm’s Law and Resistance MCQs with verified questions, past-paper solutions, and conceptual explanations for CSS, PMS, FPSC, PPSC, and NTS examinations.

31 Solved Questions • 24 Mins Practice • Updated for 2026 Competitive Exams
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2026 Solved Edition · Updated October 2026 · Verified Editorial Standards

Welcome to the verified preparation module for Ohm’s Law and Resistance MCQs on McqsMind. This comprehensive set offers solved multiple-choice questions with answers, detailed explanations, and authentic past-paper style questions aligned with the latest syllabus of Current Electricity (Physics).

100% Verified Answer Keys CSS, PMS, FPSC, PPSC, NTS Ready 2026/2027 Syllabus Guidelines

Direct Definition & Conceptual Scope

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Ohm’s Law and Resistance constitutes an essential examination topic within Physics, evaluating theoretical principles, historical context, and practical problem-solving applications. On MCQsMind, candidates practice verified past-paper solutions, conceptual breakdowns, and syllabus-aligned questions tailored for CSS, PMS, and competitive screening examinations.

Solved Questions

Practice with answers, explanations, and exam-focused revision notes.

31 MCQs Page 1

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Topic Notes: Ohm’s Law and Resistance

Quick Revision 3 min read 14 key points
Section 1 of 4

1 1. Fundamental Concepts

4 points
  • Definition
    Ohm’s Law: States that the current flowing through a metallic conductor is directly proportional to the potential difference across its ends, provided physical conditions like temperature remain constant.
  • Definition
    Resistance (R): The opposition offered by a material to the flow of electric charge, defined as the ratio of potential difference (V) to current (I), measured in Ohms (Ω).
  • Definition
    Resistivity (ρ): Also known as specific resistance, it is the resistance offered by a unit cube (1 m³) of a material. It depends solely on the material nature and temperature, not dimensions.
  • Definition
    Conductance (G): The reciprocal of resistance (G = 1/R), representing the ease with which current flows through a conductor. Its SI unit is Siemens (S) or mho.
Section 1 / 4
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1
Resistance of a wire has been calculated as 6.2 Ω with 8% uncertainty. Then the result in ohms will be recorded as:
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2
The wire used in the construction of a rheostat is of the material:
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3
The resistances Rx and Ry of the squares are measured between the opposite faces shaded in the diagram. What is the value of Rx/Ry?
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4
Effective resistance between point A and B is:
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5
A wire of resistance 36 Ω is bent in the form of an equilateral triangle. The resistance between two vertices is
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7
A piece of wire of resistance 4 ohm is bent through 180° at its mid-point and the two halves are twisted together. Then the resistance is
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8
346. Resistances n each of r ohm, when connected in parallel give an equivalent resistance of R ohm. If these resistances were connected in series, the combination would have a resistance in ohms equal to
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9
A wire has a resistance of 10 Ω. What will be its resistance if it is stretched by one tenth of its original length?
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10
If signal is applied to input of non-inverting amplifier through resistance of 100 kΩ, and the value of feedback resistance is 10 kΩ, the gain is:
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Pedagogical Syllabus Blueprint

Ohm’s Law and Resistance MCQs: Preparation Strategy & Exam Blueprint

Examination Weightage & Commission Distribution

In Pakistan's premier competitive examinations—including the Federal Public Service Commission (FPSC General Recruitment & CSS MPT), Punjab Public Service Commission (PPSC Lecturer, Tehsildar & PMS Screening), KPPSC, SPSC, and BPSC—questions derived from Ohm’s Law and Resistance MCQs consistently constitute a decisive 10% to 25% weightage of the Current Electricity paper. Testing agencies frequently evaluate both foundational factual recall and deeper analytical comprehension, requiring aspirants to master key dates, statutory articles, constitutional clauses, and thematic definitions.

High-Yield Conceptual Pillars & Distractor Analysis

Historical trend analysis across past five-year examination cycles demonstrates that examiner traps frequently involve closely matched numerical alternatives, chronologically contiguous treaties, and semantic subtleties in statutory phraseology. When preparing Ohm’s Law and Resistance MCQs, candidates must deliberately review the underlying rationale provided for every question rather than merely memorizing raw answer options. Understanding why incorrect distractors fail is the most reliable predictor of achieving top percentiles in computerized and optical mark recognition (OMR) screening tests.

Negative Marking Mitigation & Time Management Protocol

For examinations enforcing negative marking penalties (such as PPSC's 0.25-mark deduction per erroneous response or NTS gatekeeper quotas), an aggressive elimination technique must be deployed. Candidates should systematically rule out improbable options first to elevate probability thresholds from 25% to 50% or 100%. Allocating an average of 45 to 60 seconds per item during mock trials builds the psychological stamina and cognitive precision required to complete 100-question papers within official 90-minute time limits.

Recommended Reference Sources & Statutory Reading

To achieve definitive conceptual mastery in Physics, candidates are advised to cross-reference our solved explanations with primary gazettes, statutory texts, and canonical academic textbooks. Verifying controversial questions against authentic official repositories guarantees that prospective civil servants and professional candidates present incontestable answers during both optical paper evaluations and viva voce departmental interviews.