Physics 11 past paper 2024

Optically active crystal rotates the:

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Under what conditions do two or more sources of light behave as coherent sources?

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Explain **addition of number of vectors** ($N$ vectors) by using rectangular components method. Illustrate with diagram.

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For an ideal gas the internal energy is directly proportional to:

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Why is the flash of lightning seen earlier than the thunder? Explain briefly.

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What is meant by **projectile motion**? Explain in detail. Derive expressions for height of projectile and time of flight of projectile.

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

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Describe **Bernoulli's equation** for ideal fluid flow.

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If the magnitude of $\vec{A} \cdot \vec{B} = \frac{1}{2}AB$, then the angle between $\vec{A}$ and $\vec{B}$ is:

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Show that: $\|\vec{A} \times \vec{B}\|^2 + \|\vec{A} \cdot \vec{B}\|^2 = A^2 B^2$

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Explain the principle of energy conservation in simple harmonic motion (SHM), including the interconversion between kinetic and potential energy.

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Which one remains constant for a satellite in orbit?

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Under what circumstances would a vector have components that are equal in magnitude? Explain graphically.

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Show that the work done in a gravitational field is independent of the path followed.

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Angle of projection for which the range of a projectile becomes half of its maximum range is equal to:

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Describe the limitations of dimensional analysis.

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What is meant by **orbital velocity**? Derive relationship between orbital velocity, the gravitational constant, mass and radius of orbit.

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The slope of velocity-time graph at any instant represents:

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For a projectile show that: $R = R_{\text{max}} \sin 2\theta$

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Explain **Doppler effect** on the basis of principle of superposition.

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If the body of mass $2\text{ kg}$ is raised vertically through $3\text{ m}$, then work done will be:

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Differentiate between **conservative** and **non-conservative forces**.

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Show that: $C_p - C_v = R$

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Which one of the following is a nonrenewable source of energy?

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Show that the given equation is dimensionally consistent: $2as = v_f^2 - v_i^2$

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If $A_x = -2, A_y = -2$ then resultant vector will make angle:

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A machine needs $500\text{ J}$ of energy to raise a $5\text{ kg}$ block at a distance of $3.0\text{ m}$. Find the **efficiency** of the machine.

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Which of the following devices is used to measure speed of liquid flow?

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Differentiate between **radian** and **steradians**. Show that number of steradians in sphere are equal to $4\pi\text{ Sr}$.

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A mass spring system is pulled slowly from mean position to ($x_o$) then the amount of work done will be:

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Describe **angular displacement** and **angular acceleration**. Express angular displacement in radian.

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Tuning of radio is the best example of:

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Briefly explain the equation $\tan \theta = \frac{v^2}{rg}$, relating **banking angle** '$\theta$' to speed '$v$' and radius of curvature '$r$'.

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If 332 waves pass through a medium in one second with speed of 332 m/s, then wavelength will be:

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Why do fog droplets appear to be suspended in air? Explain briefly.

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If pressure of air is increased two times then speed of sound in air will:

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What is the **moment of inertia** of a 50 kg sphere whose radius is 25 cm?

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Length of pipe is $10\text{ cm}$ (closed at one end). The maximum wavelength will be:

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A certain pipe has a cross-sectional area of $0.0002\text{ m}^2$ in which water is flowing at $5\text{ m/s}$. Find **flow rate**.

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Why is there **weightlessness** in artificial satellite? Explain briefly.

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In a ripple tank, 20 waves pass through a certain point in one second. If the wavelength of the wave is $4\text{ cm}$, then find the **speed of the wave**.

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How the amplitude of a forced oscillation changes with frequency near the natural frequency of the system. Describe graphically.

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How does the variation of pressure affect the speed of sound in air? Explain briefly.

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Briefly explain **Brewster's law** of polarization.

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Calculate the work done by a thermodynamic system during a volume change from V₁ to V₂ against an external pressure.

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Why do the systems tend to become **less orderly** over time? Explain briefly.

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Briefly explain **diffraction of x-rays** through crystals.

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How are **colour patterns** formed in interference of light through thin films? Explain briefly.

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Determine the two complementary angles at which the horizontal ranges of two projectiles become equal when velocity of projections and the acceleration due to gravity are kept cons…

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Briefly explain **adiabatic process** by using first law of thermodynamics.

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What is meant by **impulse**? How it can be related to momentum of body? Explain briefly.

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