The time period of a mass-spring system depends on MCQ with Answer and Explanation

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The time period of a mass-spring system depends on

A. Mass only

B. Spring constant only

C. Gravity

D. Both mass and spring constant

Answer: Option D

Solution (By JKSSB Mock Tests)

T = 2π√(m/k). Depends on mass and stiffness.

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Question #1

Magnetic field around straight current-carrying wire is:

A. Uniform

B. Parallel to wire

C. Radial

D. Circular concentric

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Correct Answer: Option D

Explanation:
Biot-Savart law: field forms concentric circles around wire, direction by right-hand thumb rule. Magnitude B = μ₀I/(2πr), decreasing with distance. Memory tip: 'Right-hand rule: thumb = current, fingers = field circles'. Fundamental magnetism concept frequently tested in competitive exams.

This question belongs to: Science Physics

Question #2

A bimetallic strip is made of brass and invar. On heating, it bends with brass on

A. Outer side

B. Inner side

C. Depends on thickness

D. No bending

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Correct Answer: Option A

Explanation:
Brass expands more than invar. So it becomes longer, forcing strip to bend with brass on convex (outer) side.

This question belongs to: Science Physics

Question #3

The work done in moving a body along a closed path in a conservative force field is

A. Minimum

B. Zero

C. Maximum

D. Depends on path

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Correct Answer: Option B

Explanation:
Conservative forces (gravitational, electrostatic) have zero net work around closed path. Friction is non-conservative.

This question belongs to: Science Physics

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