The slope of a velocity-time graph gives MCQ with Answer and Explanation

Question Report Error

The slope of a velocity-time graph gives

A. Acceleration

B. Distance

C. Speed

D. Displacement

Answer: Option A

Solution (By JKExamLibrary)

Slope = dv/dt = acceleration. Area under v-t gives displacement. Often confused.

This question belongs to: Science Physics

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Practice More Physics Questions

Question #1 Report Error

Temperature where Fahrenheit reading is double Celsius reading:

A. 160°C

B. 320°C

C. 40°C

D. 80°C

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Correct Answer: Option A

Explanation:
F = (9/5)C + 32. Given F = 2C: 2C = 1.8C + 32 ⇒ 0.2C = 32 ⇒ C = 160°. Verify: F = 2×160 = 320°; formula: (9/5)×160+32 = 288+32 = 320°. Memory aid: Solve linear equation for temperature conversion problems. Algebraic manipulation of scale relations frequently tested in competitive exams.

This question belongs to: Science Physics

Question #2 Report Error

The dimensional formula of coefficient of viscosity is

A. [ML⁻²T]

B. [MLT⁻¹]

C. [ML⁻¹T⁻¹]

D. [M⁰LT⁻¹]

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Correct Answer: Option C

Explanation:
Viscosity η = Force/(Area × velocity gradient). Force [MLT⁻²], area [L²], velocity gradient [T⁻¹]. So η = [MLT⁻²]/([L²][T⁻¹]) = [ML⁻¹T⁻¹]. Often asked.

This question belongs to: Science Physics

Question #3 Report Error

Bohr radius r_n ∝

A. n

B. n²

C. 1/n²

D. 1/n

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Correct Answer: Option B

Explanation:
Bohr model: r_n = n²a₀ ⇒ r ∝ n². Higher n = larger orbit. Memory tip: 'Bohr: r ∝ n²; E ∝ -1/n²'. Atomic physics relation frequently tested in competitive exams.

This question belongs to: Science Physics

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