The transfer of heat by the actual movement of particles is MCQ with Answer and Explanation

The transfer of heat by the actual movement of particles is
A. Convection
B. Radiation
C. Conduction
D. Absorption
Answer: Option A
Solution (By JKSSB Mock Tests)
Convection involves bulk movement of fluid particles (liquid/gas). Conduction: vibration transfer without particle movement. Radiation: EM waves. Absorption is taking in heat.

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Practice More Physics Questions

Question #1
A piece of ice of density 0.9 g/cm³ floats in water. Fraction of volume above water is
A. 0.2
B. 0.5
C. 0.9
D. 0.1

Correct Answer: Option D


Explanation:
Submerged fraction = ρ_ice/ρ_water = 0.9, above = 0.1 (10%).

This question belongs to: Science Physics
Question #2
The dimensional formula for work is
A. [ML²T⁻¹]
B. [ML²T⁻²]
C. [MLT⁻²]
D. [MLT⁻¹]

Correct Answer: Option B


Explanation:
Work = Force × displacement = [MLT⁻²][L] = [ML²T⁻²].

This question belongs to: Science Physics
Question #3
A convex lens is placed in water. Its focal length
A. Increases
B. Decreases
C. Remains same
D. Becomes zero

Correct Answer: Option A


Explanation:
Refractive index relative to water decreases, so power decreases, focal length increases.

This question belongs to: Science Physics