The mechanical advantage of a lever is given by MCQ with Answer and Explanation

Question Report Error

The mechanical advantage of a lever is given by

A. Load arm/Effort arm

B. Load × Effort

C. Load/Effort

D. Effort/Load

Answer: Option C

Solution (By JKExamLibrary)

MA = Load / Effort. For ideal, also = Effort arm / Load arm.

This question belongs to: Science Physics

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Practice More Physics Questions

Question #1 Report Error

The electrical resistance of a conductor depends on its

A. Length and area of cross-section

B. Colour

C. Magnetic property

D. Transparency

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Correct Answer: Option A

Explanation:
R = ρL/A, depends on length (L), cross-sectional area (A), and resistivity (ρ) which depends on material and temperature. Not on colour or transparency.

This question belongs to: Science Physics

Question #2 Report Error

Light year is unit of:

A. Distance

B. Time

C. Luminosity

D. Speed

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Correct Answer: Option A

Explanation:
Light year: distance light travels in one year in vacuum ≈ 9.46×10¹⁵ m. Astronomical distance unit, not time. Memory aid: 'Light year = speed × time = distance'. Unit knowledge frequently tested in competitive exams to avoid common misconception about light year being time unit.

This question belongs to: Science Physics

Question #3 Report Error

A ball is thrown vertically upward with speed 20 m/s. The maximum height reached (g = 10 m/s²) is

A. 10 m

B. 200 m

C. 20 m

D. 40 m

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Correct Answer: Option C

Explanation:
Using v² = u² - 2gH, at maximum height v = 0. So 0 = 20² - 2×10×H => 400 = 20H => H = 20 m. Alternative formula: H = u²/(2g) = 400/20 = 20 m. Remember to use consistent units. For quick calculation, u²/(2g) is handy.

This question belongs to: Science Physics

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