The direction of magnetic field around a straight current-carrying wire is given by MCQ with Answer and Explanation
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Question #1
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The scientist who discovered the nucleus of an atom is
Question #2
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Which of the following statements about inertia is correct?
Correct Answer: Option A
Explanation:
Inertia is the inherent property of matter that resists changes in its state of rest or uniform motion, as stated in Newton's first law. It depends solely on mass, not velocity. Inertia is not a force; forces cause changes in motion. Greater mass implies greater inertia. Statement C precisely defines inertia. Common misconception: confusing inertia with momentum (which depends on velocity). Exam tip: Remember 'inertia ∝ mass'; this concept underpins all Newtonian mechanics questions. Frequently tested in conceptual sections of competitive exams to identify fundamental understanding.
Inertia is the inherent property of matter that resists changes in its state of rest or uniform motion, as stated in Newton's first law. It depends solely on mass, not velocity. Inertia is not a force; forces cause changes in motion. Greater mass implies greater inertia. Statement C precisely defines inertia. Common misconception: confusing inertia with momentum (which depends on velocity). Exam tip: Remember 'inertia ∝ mass'; this concept underpins all Newtonian mechanics questions. Frequently tested in conceptual sections of competitive exams to identify fundamental understanding.
Question #3
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A body is lifted vertically through a height h. The work done against gravity is stored as:
Correct Answer: Option B
Explanation:
When a body is lifted against gravity, work done (mgh) is stored as gravitational potential energy. This energy can be recovered when the body falls. Kinetic energy relates to motion, thermal to heat, elastic to deformed materials. The conservation of energy principle states that work done against conservative forces becomes potential energy. Formula: PE = mgh, where h is height above reference. Memory aid: 'Potential' means stored energy due to position. This conceptual question tests energy transformation understanding, frequently appearing in work-energy theorem applications in competitive exams.
When a body is lifted against gravity, work done (mgh) is stored as gravitational potential energy. This energy can be recovered when the body falls. Kinetic energy relates to motion, thermal to heat, elastic to deformed materials. The conservation of energy principle states that work done against conservative forces becomes potential energy. Formula: PE = mgh, where h is height above reference. Memory aid: 'Potential' means stored energy due to position. This conceptual question tests energy transformation understanding, frequently appearing in work-energy theorem applications in competitive exams.
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