SSC CGL Physics Questions and Answers – Page 9

In concise terms, What is the energy stored in a stretched spring an example of? — the scientifically appropriate response is Potential energy. Option-wise review: Potential energy is correct under the condition given in the stem. Kinetic energy is incorrect because it describes a different quantity or phenomenon and does not meet the stated condition. Thermal energy is also incorrect; although it may be a valid physics term, its definition or application is not the one asked here. Nuclear energy is incorrect because it fails the governing relation or characteristic relevant to this case. Therefore, option C, Potential energy, is factually and logically consistent with the question. Energy stored in a stretched spring is elastic potential energy.

In concise terms, What happens to the resistance of a conductor when its temperature increases? — the scientifically appropriate response is Increases. Option-wise review: Increases is correct under the condition given in the stem. Decreases is incorrect because it describes a different quantity or phenomenon and does not meet the stated condition. Remains the same is also incorrect; although it may be a valid physics term, its definition or application is not the one asked here. Becomes zero is incorrect because it fails the governing relation or characteristic relevant to this case. Therefore, option C, Increases, is factually and logically consistent with the question.

In concise terms, What is the phenomenon of total internal reflection used in? — the scientifically appropriate response is Optical fiber. Option-wise review: Optical fiber is correct under the condition given in the stem. Periscope is incorrect because it describes a different quantity or phenomenon and does not meet the stated condition. Telescope is also incorrect; although it may be a valid physics term, its definition or application is not the one asked here. Microscope is incorrect because it fails the governing relation or characteristic relevant to this case. Therefore, option B, Optical fiber, is factually and logically consistent with the question. Total internal reflection is the principle behind optical fibers used in communication.

In concise terms, Which law gives the relationship between current and resistance at constant temperature? — the scientifically appropriate response is Ohm's Law. Option-wise review: Ohm's Law is correct under the condition given in the stem. Faraday's Law is incorrect because it describes a different quantity or phenomenon and does not meet the stated condition. Coulomb's Law is also incorrect; although it may be a valid physics term, its definition or application is not the one asked here. Kirchhoff's Law is incorrect because it fails the governing relation or characteristic relevant to this case. 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, Ohm's Law, is factually and logically consistent with the question. Ohm's Law states V = IR showing the relationship between voltage current and resistance.

In concise terms, What is the SI unit of work? — the scientifically appropriate response is Joule. Option-wise review: Joule is correct under the condition given in the stem. Watt is incorrect because it describes a different quantity or phenomenon and does not meet the stated condition. Newton is also incorrect; although it may be a valid physics term, its definition or application is not the one asked here. Pascal is incorrect because it fails the governing relation or characteristic relevant to this case. 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, Joule, is factually and logically consistent with the question. Work is measured in Joules (J).

In concise terms, Which type of lens is used to correct myopia (short-sightedness)? — the scientifically appropriate response is Concave lens. Option-wise review: Concave lens is correct under the condition given in the stem. Convex lens is incorrect because it describes a different quantity or phenomenon and does not meet the stated condition. Cylindrical lens is also incorrect; although it may be a valid physics term, its definition or application is not the one asked here. Bifocal lens is incorrect because it fails the governing relation or characteristic relevant to this case. Therefore, option B, Concave lens, is factually and logically consistent with the question. Concave (diverging) lens corrects myopia by diverging light rays before they enter the eye.

— the scientifically appropriate response is Ohm. Option-wise review: Ohm is correct under the condition given in the stem. Ampere is incorrect because it describes a different quantity or phenomenon and does not meet the stated condition. Volt is also incorrect; although it may be a valid physics term, its definition or application is not the one asked here. Farad is incorrect because it fails the governing relation or characteristic relevant to this case. 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, Ohm, is factually and logically consistent with the question. Resistance is measured in Ohms (Ω) named after Georg Simon Ohm.

In concise terms, The bending of light when it passes from one medium to another is called? — the scientifically appropriate response is Refraction. Option-wise review: Refraction is correct under the condition given in the stem. Reflection is incorrect because it describes a different quantity or phenomenon and does not meet the stated condition. Diffraction is also incorrect; although it may be a valid physics term, its definition or application is not the one asked here. Polarization is incorrect because it fails the governing relation or characteristic relevant to this case. Therefore, option C, Refraction, is factually and logically consistent with the question. The bending of light at the interface of two media is called refraction.

cepted physical definition, law, relation, or working principle involved. In concise terms, What is the principle behind a transformer? — 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.

In concise terms, What is the acceleration due to gravity on Earth's surface? Acceleration due to gravity g = 9.8 m/s² (approximately 10 m/s² for calculations).