The odometer in a vehicle measures MCQ with Answer and Explanation

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The odometer in a vehicle measures

A. Distance travelled

B. Fuel consumption

C. Engine RPM

D. Speed

Answer: Option A

Solution (By JKSSB Mock Tests)

Odometer records cumulative distance. Speedometer shows instantaneous speed.

This question belongs to: Science Physics

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Question #1

The escape velocity from Earth does not depend on

A. Mass of the object

B. Universal gravitational constant

C. Mass of Earth

D. Radius of Earth

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Correct Answer: Option A

Explanation:
v_esc = √(2GM/R), independent of m. Heavier object needs more energy, but velocity same. All objects fall at same rate. Important concept.

This question belongs to: Science Physics

Question #2

A ball is dropped from a height of 20 m. Time to reach ground (g=10) is

A. 1 s

B. 3 s

C. 4 s

D. 2 s

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Correct Answer: Option D

Explanation:
h = ½gt² => t = √(2h/g) = √(40/10) = √4 = 2 s. Free fall formula. Final velocity v = gt = 20 m/s.

This question belongs to: Science Physics

Question #3

TIR used in:

A. Optical fibers

B. Both

C. Neither

D. Diamond brilliance

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Correct Answer: Option B

Explanation:
Optical fibers: TIR confines light in core. Diamonds: high n gives small θ_c, causing multiple TIRs for sparkle. Memory aid: 'TIR applications: fibers (communication), diamonds (optics)'. Optics application frequently tested in competitive exams.

This question belongs to: Science Physics

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