SSC CGL Physics Questions and Answers – Page 7

— the scientifically appropriate response is Henry. Option-wise review: Henry is correct under the condition given in the stem. Ohm is incorrect because it describes a different quantity or phenomenon and does not meet the stated condition. Farad is also incorrect; although it may be a valid physics term, its definition or application is not the one asked here. Weber 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 D, Henry, is factually and logically consistent with the question. Inductance is measured in Henry (H) named after Joseph Henry.

In concise terms, Which effect explains why a compass needle deflects when placed near a current-carrying wire? — the scientifically appropriate response is Magnetic effect of current. Option-wise review: Magnetic effect of current is correct under the condition given in the stem. Electric effect is incorrect because it describes a different quantity or phenomenon and does not meet the stated condition. Thermal effect is also incorrect; although it may be a valid physics term, its definition or application is not the one asked here. Chemical effect is incorrect because it fails the governing relation or characteristic relevant to this case. Therefore, option B, Magnetic effect of current, is factually and logically consistent with the question. The magnetic effect of electric current causes the compass needle to deflect.

— the scientifically appropriate response is Current. Option-wise review: Current is correct under the condition given in the stem. Voltage is incorrect because it describes a different quantity or phenomenon and does not meet the stated condition. Resistance is also incorrect; although it may be a valid physics term, its definition or application is not the one asked here. Power is incorrect because it fails the governing relation or characteristic relevant to this case. Therefore, option B, Current, is factually and logically consistent with the question. An ammeter measures electric current in a circuit and is connected in series.

In concise terms, Which force acts between two charged particles? — the scientifically appropriate response is Electrostatic force. Option-wise review: Electrostatic force is correct under the condition given in the stem. Magnetic force is incorrect because it describes a different quantity or phenomenon and does not meet the stated condition. Gravitational force is also incorrect; although it may be a valid physics term, its definition or application is not the one asked here. Nuclear force is incorrect because it fails the governing relation or characteristic relevant to this case. Therefore, option C, Electrostatic force, is factually and logically consistent with the question. The electrostatic (Coulomb) force acts between two charged particles.

— the scientifically appropriate response is Farad. Option-wise review: Farad is correct under the condition given in the stem. Henry is incorrect because it describes a different quantity or phenomenon and does not meet the stated condition. Tesla is also incorrect; although it may be a valid physics term, its definition or application is not the one asked here. Ohm 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, Farad, is factually and logically consistent with the question. Capacitance is measured in Farad (F) named after Michael Faraday.

In concise terms, In which medium does sound travel fastest? — the scientifically appropriate response is Steel. Option-wise review: Steel is correct under the condition given in the stem. Air is incorrect because it describes a different quantity or phenomenon and does not meet the stated condition. Water is also incorrect; although it may be a valid physics term, its definition or application is not the one asked here. Vacuum is incorrect because it fails the governing relation or characteristic relevant to this case. Therefore, option C, Steel, is factually and logically consistent with the question. Sound travels fastest in solids (steel) because the molecules are closely packed.

In concise terms, What is the escape velocity from Earth's surface? Escape velocity from Earth's surface is approximately 11.2 km/s.

definition, law, relation, or working principle involved. In concise terms, Which law of thermodynamics states that energy can neither be created nor destroyed? — the scientifically appropriate response is First Law. Option-wise review: First Law is correct under the condition given in the stem. Zeroth Law is incorrect because it describes a different quantity or phenomenon and does not meet the stated condition. Second Law is also incorrect; although it may be a valid physics term, its definition or application is not the one asked here. Third Law is incorrect because it fails the governing relation or characteristic relevant to this case. This removes the common confusion created by neighbouring concepts. Therefore, option B, First Law, is factually and logically consistent with the question. First Law of Thermodynamics is the law of conservation of energy.

In concise terms, What is the SI unit of frequency? — the scientifically appropriate response is Hertz. Option-wise review: Hertz is correct under the condition given in the stem. Meter is incorrect because it describes a different quantity or phenomenon and does not meet the stated condition. Second is also incorrect; although it may be a valid physics term, its definition or application is not the one asked here. Candela 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, Hertz, is factually and logically consistent with the question. Frequency is measured in Hertz (Hz). 1 Hz = 1 cycle per second.

In concise terms, What happens to kinetic energy when the speed of an object doubles? — the scientifically appropriate response is Becomes four times. Option-wise review: Becomes four times is correct under the condition given in the stem. Doubles is incorrect because it describes a different quantity or phenomenon and does not meet the stated condition. Halves is also incorrect; although it may be a valid physics term, its definition or application is not the one asked here. Remains same is incorrect because it fails the governing relation or characteristic relevant to this case. Therefore, option C, Becomes four times, is factually and logically consistent with the question. If v doubles KE = ½m(2v)² = 4(½mv²) = 4 times the original KE.