Which of the following statements about inertia is correct? MCQ with Answer and Explanation

Which of the following statements about inertia is correct?
A. Inertia depends on the velocity of the body
B. Inertia is the property of a body to resist change in its state of motion
C. Inertia is a force that keeps bodies in motion
D. Inertia decreases with increasing mass
Answer: Option B
Solution (By JKExamLibrary)
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.

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Question #1 Report Error
Which famous physicist correctly formulated the laws of electromagnetic induction mathematically, later synthesizing all known electromagnetic phenomena into four fundamental equations?
A. André-Marie Ampère
B. Michael Faraday
C. James Clerk Maxwell
D. Heinrich Hertz

Correct Answer: Option C


Explanation:
While Faraday performed the groundbreaking experimental work discovering electromagnetic induction, it was James Clerk Maxwell who formalized these discoveries mathematically. Maxwell's equations (a set of four differential equations) elegantly united electricity, magnetism, and optics, proving theoretically that light itself is a propagating electromagnetic wave.

This question belongs to: Science Physics
Question #2 Report Error
Which of the following is an ohmic conductor?
A. Transistor
B. Diode
C. Electrolyte
D. Copper wire

Correct Answer: Option D


Explanation:
Copper wire obeys Ohm's law (V ∝ I) at constant temperature. Diode, transistor are non-ohmic (non-linear). Electrolytes can be non-linear. Metals are ohmic.

This question belongs to: Science Physics
Question #3 Report Error
One Parsec is a unit of astronomical distance. It is defined as the distance at which a radius of one astronomical unit (AU) subtends an angle of one second of arc. One parsec is approximately equal to:
A. 3.0 x 10^8 meters
B. 9.46 x 10^15 meters
C. 3.26 light years
D. 1.5 x 10^11 meters

Correct Answer: Option C


Explanation:
The parsec (parallax second) is the largest standard unit of distance used in astronomy. 1 Astronomical Unit (AU) is approx 1.5 x 10^11 m. 1 Light Year (ly) is approx 9.46 x 10^15 m. 1 Parsec is approximately 3.08 x 10^16 m. Converting parsecs to light years: (3.08 x 10^16) / (9.46 x 10^15) ≈ 3.26 light years.

This question belongs to: Science Physics