Physics 11 past paper 2023

Which one of the following is a **dimensionless quantity**?

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Differentiate between **'precision'** and **'accuracy'**.

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Show that the potential at a point is equal to work done in bringing a unit mass from infinity to that point.

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Real and apparent weights of a body seem to be equal when body moves with acceleration:

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How are cranes able to lift heavy load without toppling? Explain briefly.

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Differentiate **'molar specific heat at constant pressure ($C_p$)'** and **'molar specific heat at constant volume ($C_v$)'**. Justify that $C_p > C_v$. Also prove that $C_p - C_v…

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Prove that the equation $E = hf$ is dimensionally correct. (Where $E = $ energy and $f = $ frequency)

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Describe **S.H.M.** Prove that the Projection of a body moving in a circular path executes S.H.M along the diameter. Also derive an expression for time period and frequency of this…

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Which one is **TRUE** for isothermal process?

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Co-relate Newton's third law of motion and conservation of momentum with the help of an example.

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A source of sound and observer are moving toward each other. What happens to the apparent pitch heard by the observer? What will happen if both are moving away from each other? Exp…

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If the temperatures of source and sink of a Carnot engine (having efficiency $\eta_1$) are each increased by $200 K$, then the efficiency $\eta_2$ will:

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What is **impulsive force**? Explain the effect of lengthening of time on impulsive force. Give one of its common life applications.

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State and derive Bernoulli's equation. Also give one of its applications.

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Due to which phenomenon different colours appear in soap film in sunlight?

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What will be the effect of gravity on vertical and horizontal components of projectile velocity? Give its mathematical expression(s).

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Calculate the resultant of two forces of $30 N$ and $40 N$ acting at a point making angles of $0^{\circ}$ and $120^{\circ}$ with x-axis respectively.

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In Young's double slit experiment, the fringe spacing is:

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Describe that work done is equal to area under the force-displacement graph.

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For constructive interference, path difference, $d = $

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What is **escape velocity** ($v_{esc}$)? Derive the expression $v_{esc} = \sqrt{2gR_e}$.

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When length of a simple pendulum is doubled, the ratio of old to new time period will be:

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Why is a rifle barrel "rifled"? Give reason in context of conservation of angular momentum.

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If 30 waves pass through a medium in 1 second with speed 30 m/s, then wavelength is:

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Briefly explain the following terms: (a) Moment of inertia of a body (b) Angular momentum

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Stars moving away from the earth show:

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Which object will attain terminal velocity first, a lighter object or a heavier object? Justify your answer.

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If tension in a stretched string is made four times then velocity of waves:

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The velocity of projectile at its maximum height is:

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What will be the frequency of a simple pendulum if its length is 2 meters? (Assume g = 9.8 m/s² or 10 m/s²)

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If $\vec{A} = 2 \hat{i} - \hat{j} + 3 \hat{k}$ then magnitude of $\vec{A}$ is:

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How progressive waves differ from stationary waves? Give examples also.

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$F \cdot \Delta t = \dots$

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In equation of continuity, the 'volume flow rate' is equal to:

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What is meant by the **path difference** with reference to the interference of two waves?

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State **Huygens' Principle**. Use it to construct wave front after a time interval '$t$'.

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Is the energy degraded during all natural processes? Explain.

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Find Moon's angular momentum about Earth using Earth-Moon distance = 3.8 × 10^8 m and Mass of Moon = 7.35 × 10^22 kg. (Assume Moon's orbital period is 27.3 days.)

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