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SSC CGL
mediumQ. No. 14774-what-is-the-principle-behind-a-transformer

What is the principle behind a transformer?

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What is the principle behind a transformer? Here, the relevant answer is “Electromagnetic induction.” A sound solution relies on the governing concept rather than a memorised option letter, because option order may change in another paper. While reading a question, first note whether it asks for a definition, SI unit, formula, direction, cause, effect, or practical use. The distractors in this question—Photoelectric effect, Nuclear fission, Thermionic emission—do not satisfy the exact condition stated. The final selection must agree with the explanation and marked answer: Electromagnetic induction.

AElectromagnetic induction
BPhotoelectric effect
CNuclear fission
DThermionic emission
Correct Answer: Electromagnetic inductionYour Answer: A

Explanation

cepted physical definition, law, relation, or working principle involved. — the scientifically appropriate response is Electromagnetic induction. Option-wise review: Electromagnetic induction is correct under the condition given in the stem. Photoelectric effect is incorrect because it describes a different quantity or phenomenon and does not meet the stated condition. Nuclear fission is also incorrect; although it may be a valid physics term, its definition or application is not the one asked here. Thermionic emission is incorrect because it fails the governing relation or characteristic relevant to this case. Therefore, option A, Electromagnetic induction, is factually and logically consistent with the question. A transformer works on the principle of electromagnetic induction.

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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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What is the principle behind... | SSC CGL Physics MCQ | Exambodh