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Ohm_s Law and Resistance MCQs for Competitive Exams

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Ohm_s Law and Resistance MCQs for Competitive Exams

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Topic Notes: Ohm_s Law and Resistance

These notes summarize the key preparation context before you attempt the MCQs. Review the topic focus, then practice the questions below with answers and explanations.

Quick Overview

Ohm_s Law and Resistance MCQs in Physics are useful for candidates who need targeted practice for CSS, PMS, FPSC, PPSC, NTS, entry tests, and other competitive exams in Pakistan. This topic page is designed for quick revision, repeated practice, and exam-focused preparation.

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11
Which of the following parameters significantly influence the electrical resistance of a conductor?
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12
Identify the SI unit for electrical resistance.
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13
According to Ohm's Law, how is resistance (R) defined in terms of voltage (V)?
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14
How does the electrical resistance of a typical metallic conductor change in response to temperature variations?
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15
An electric heater operates at 60 V with a current of 4 A. If the voltage is increased to 127.5 V, what will be the new current drawn by the heater, assuming constant resistance?
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16
How do the electrical resistances of copper and germanium change when cooled from room temperature to 77 K?
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17
In a closed electric circuit obeying Ohm's Law, what is the nature of the ratio between voltage and direct current?
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18
What is the standard SI unit used to measure electrical impedance?
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19
What is the standard unit used to quantify the electrical conductivity of a material?
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20
In what configuration are street lamps typically connected to ensure independent operation?
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