Class 11 Physics – Daily Revision MCQ (English Medium)
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How many significant figures are there in the measurement 0.03060 m?
Chapter 1: Units and Measurements
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Answer: C. 4
Zeros before the first nonzero digit are not significant; the zero between 3 and 6 and the final zero after the decimal point are, giving 3, 0, 6, 0 = 4.On the Celsius scale, absolute zero (the zero of the Kelvin scale) is at:
Chapter 7: Thermal Properties of Matter
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Answer: B. −273.15 °C
Pressure–temperature graphs of all gases meet the temperature axis at −273.15 °C; this is absolute zero, the zero of the Kelvin scale.A ball is projected from the ground with speed 20 m/s at 45° to the horizontal. Taking g = 10 m/s², its horizontal range is:
Chapter 3: Motion in a Plane
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Answer: C. 40 m
R = u² sin2θ / g = (20)² × sin90° / 10 = 400 × 1 / 10 = 40 m (45° gives the maximum range).According to Kepler's law of areas, a planet moving around the Sun moves:
Chapter 5: Gravitation
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Answer: A. fastest when it is nearest to the Sun
The line joining the planet and the Sun sweeps equal areas in equal times, so the planet must move faster when it is closer to the Sun.Within the elastic limit, Poisson's ratio is the ratio of:
Chapter 6: Mechanical Properties of Solids
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Answer: D. lateral strain to linear strain
Poisson's ratio = lateral strain ÷ linear strain; being a ratio of two strains, it has no unit.Newton treated sound travel in air as isothermal. Laplace's correction changed his formula v = √(P/ρ) by bringing in which factor?
Chapter 8: Sound
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Answer: B. γ = Cp/Cv, the ratio of specific heats of air
Laplace said compressions and rarefactions are adiabatic, so v = √(γP/ρ) with γ = Cp/Cv ≈ 1.41 for air, which matches the experimental value.The critical angle for a pair of media is the angle of incidence in the denser medium for which the angle of refraction in the rarer medium is:
Chapter 9: Optics
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Answer: A. 90°
At the critical angle the refracted ray grazes the surface (r = 90°); for larger angles total internal reflection takes place.Two point charges at rest repel each other with force F. If the distance between them is made three times, keeping the charges the same, the new force is:
Chapter 10: Electrostatics
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Answer: D. F/9
By Coulomb's law F ∝ 1/r²; tripling r makes the force 1/3² = 1/9 of F.Resistors of 4 Ω and 12 Ω are connected in parallel. Their equivalent resistance is:
Chapter 11: Electric Current Through Conductors
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Answer: C. 3 Ω
1/Rp = 1/4 + 1/12 = 3/12 + 1/12 = 4/12, so Rp = 3 Ω (less than the smallest resistor).When pure silicon is doped with phosphorus, a pentavalent impurity, the majority charge carriers in it are:
Chapter 14: Semiconductors
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Answer: A. electrons
A pentavalent donor gives an extra free electron, making an n-type semiconductor where electrons are the majority carriers and holes the minority carriers.
Class 11: MCQ in other subjects
All questions are written by PadhaiNotes in our own words from the chapters of the official Maharashtra State Board Balbharati textbook (ebalbharati.in). Each question shows its chapter.