SSC CGL

easyQ. No. 14856-what-is-the-relationship-between-electric-power-p-voltage-v-and-current-i

What is the relationship between electric power P voltage V and current I?

Last Updated: 25 Jun 2026

What is the relationship between electric power P voltage V and current I? This question tests a core idea from school-level and competitive-examination physics. The most useful approach is to identify the physical quantity, phenomenon, law, or device named in the stem and connect it with its standard definition. Physics explains measurable natural events through quantities, units, observations, mathematical relations, and experimentally verified laws. Then check dimensions and limiting cases wherever a numerical relation is involved.

AP = V/I

BP = V+I

CP = VI

DP = V²I

Correct Answer: P = VIYour Answer: C

Explanation

P = V/I is incorrect because it describes a different quantity or phenomenon and does not meet the stated condition. Identify the chapter, recall the exact definition or equation, check the unit or direction if applicable, and then eliminate choices that contradict it. Therefore, option C, P = VI, is factually and logically consistent with the question. Electric power P = VI = I²R = V²/R where V is voltage and I is current.

Important Notes

Learn each concept as a five-part card: definition; common symbol; SI unit; principal equation; and one real-life application. This works for mechanics, heat, optics, sound, electricity, magnetism, and modern physics.
Do not interchange closely related terms: mass and weight; distance and displacement; speed and velocity; heat and temperature; reflection and refraction; real and virtual image; current and potential difference; power and energy. Such pairs generate common SSC distractors.
Eliminate P = V/I, P = V+I, P = V²I here because none fulfils the exact requirement of the stem. The final answer and correct-index field must point to option C.

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FAQ

SSC CGL Physics FAQs

Common questions and clear answers for this topic.

How many physics questions usually appear in the SSC CGL exam?

Physics typically makes up a small portion of the General Science questions, usually focused on concepts rather than numerical problems.

Which physics topics are most important for SSC CGL?

Basic mechanics, heat, sound and light, and electricity and magnetism are the areas that come up most consistently across previous papers.

Do I need to solve numerical problems for SSC CGL physics?

Rarely. Most questions are conceptual and test everyday understanding rather than calculation skills.

Is NCERT physics enough for SSC CGL preparation?

NCERT textbooks from classes 9 and 10 build a strong enough conceptual base for most of what SSC CGL asks.

How can I make physics concepts easier to remember for SSC CGL?

Connecting concepts to everyday observations, like why a thermos keeps tea warm, makes them far easier to recall than memorizing definitions.

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