Which of the following physical quantities is completely conserved during an inelastic collision? MCQ with Answer and Explanation

Question

Share Report Error

Which of the following physical quantities is completely conserved during an inelastic collision?

A. Kinetic energy

B. Linear momentum

C. Velocity

D. Mechanical energy

Answer: Option B

Solution (By JKSSB Mock Tests)

The fundamental law of conservation of momentum dictates that in a closed system with no external net forces, total linear momentum is always conserved regardless of the collision type. In an inelastic collision, some kinetic energy is converted into other forms of energy (like heat or sound or deformation work), meaning kinetic and total mechanical energy are explicitly NOT conserved.

This question belongs to: Science Physics

Request complete Subject PDF

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Physics Questions

Question #1

Share Report

Assertion (A): In a purely resistive AC circuit, voltage and current are in phase. Reason (R): Resistors do not store energy; they dissipate it as heat.

A. A is true, but R is false

B. Both A and R are true, and R is the correct explanation of A

C. A is false, but R is true

D. Both A and R are true, but R is not the correct explanation of A

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option B

Explanation:
Assertion is true: in resistive AC circuits, V and I reach peaks simultaneously (phase difference 0°). Reason is true and explains A: resistors obey Ohm's law instantaneously (V=IR), with no energy storage mechanism (unlike capacitors/inductors that cause phase shifts via energy storage/release). Thus, no phase difference arises. Memory aid: 'Resistors: V and I in phase; Capacitors: I leads V; Inductors: V leads I'. This assertion-reason question tests AC circuit fundamentals, frequently examined. Always link phase behavior to energy storage properties of components.

This question belongs to: Science Physics