BISE Multan · Class 11 · Physics · 2025 · First Annual · Group 2

The triple point of water is:

The value of $\frac{C_p}{C_v}$ for diatomic gases is:

The light emitted by LED has wavelength:

A diffraction grating has $5000$ lines per centimeter. Its grating element is:

A set of frequencies which is an integral multiple of fundamental frequency is called:

In SONAR we use:

At which displacement K.E and P.E in S.H.M will be equal:

${\mathrm{m}}^3{\mathrm{s}}^{-1}$ is the unit of:

The ratio of escape velocity to critical velocity is:

_____ is not conservative.

One properly placed Geostationary Satellite covers maximum of Longitude:

The ratio of height to range of projectile is:

When rocket moves upward, its acceleration:

Two vectors to be combined have magnitudes $65\mathrm{N}$ and $30\mathrm{N}$. The correct answer for resultant may be:

The magnitude of cross product and dot product will be equal if angle is:

$1$ solid sphere is equal to:

Absolute uncertainties are added in following operation:

How can you assess final result with total uncertainty in multiplication? Give an example.

What are dimensions? Give one example.

The period of simple pendulum is measured by a stopwatch, what type of errors are possible in the time period?

What are the dimensions and units of gravitational constant $G$ in the formula $F=G\frac{m_1{m}_2}{r^2}$.

Compare the values of the scalar product for the angles $\theta ={30}^{\circ }$ and $\theta ={60}^{\circ }$, which one is greater?

If all the components of the vectors, ${\vec{A}}_1$ and ${\vec{A}}_2$ were reversed, how would this alter ${\vec{A}}_1\times {\vec{A}}_2$.

Can a body rotate about its centre of gravity under the action of its weight?

Derive an equation for the every height of projectile motion.

Explain the circumstances in which the velocity ‘$v$’ and acceleration ‘$a$’ of a car: (i) ‘$v$’ is zero but ‘$a$’ is not zero (ii) perpendicular to one another.

Motion with constant velocity is a special case of motion with constant acceleration and with variable acceleration. Explain.

How would you prove that “potential energy increase with height and vice versa” from the formula $U=\frac{-GMm}{r}$?

When a rocket re-enters the atmosphere, its nose cone becomes very hot. Where does this heat energy comes from?

Show that orbital angular momentum, $L_o=mvr$

Why does a diver changes his body positions before and after diving in the pool?

Differentiate between real and apparent weight.

Explain how the law of conservation of angular momentum is important in diving sports?

Explain the difference between laminar flow and turbulent flow.

Why fog droplets appear to be suspended in air?

Show that in simple harmonic motion the acceleration is zero when the velocity is greatest and the velocity is zero when the acceleration is greatest.

What is the total distance travelled by an object moving with SHM in a time equal to its period, if its amplitude is $A$?

When the length of a simple pendulum is doubled, find the ratio of new frequency to old frequency.

Explain the terms; crest, trough, node and antinode.

How should a sound source move with respect to an observer so that the frequency of its sound does not change?

Write down the three cases of superposition principle.

Define diffraction of light. What is diffraction grating?

Why the Polaroid sunglasses are better than ordinary sunglasses?

An oil film spreading over a wet footpath shows colours. Explain how does it happen?

Define angular magnification and resolving power of an instrument.

Describe with the help of diagram, how a single biconvex lens can be used as a magnifying glass?

How the light signal is transmitted through the optic fibre?

Define internal energy. How is internal energy of an ideal gas related to temperature?

Specific heat of a gas at constant pressure is greater than specific heat at constant volume. Why?

Is it possible to construct a heat engine that will not expel heat into the atmosphere? Explain.

Define elastic collision. Show that relative speed of approach is equal to relative speed of separation for one dimensional collision.

Find the angle between the two vectors, $\vec{A}=5\widehat{i}+\widehat{j}$ and $\vec{B}=2\widehat{i}+4\widehat{j}$

Define Escape Velocity and derive the mathematical expression for escape velocity.

A $1000\mathrm{k}\mathrm{g}$ car is travelling with a speed of $144\mathrm{k}\mathrm{m}\mathrm{/}\mathrm{h}$ rounds a curve of radius $100\mathrm{m}$, find the necessary centripetal force.

Write the postulates of kinetic theory of gases and also describe the kinetic interpretation of temperature.

What gauge pressure is required in the city mains for a stream from a fire hose connected to the mains to reach a vertical height of $15.0\mathrm{m}$?

Explain Newton formula for speed of sound. How did Laplace correct it? Explain.

A block of mass $4\mathrm{k}\mathrm{g}$ is dropped from a height of $0.80\mathrm{m}$ on to a spring of spring constant $k=1960\mathrm{N}\mathrm{/}\mathrm{m}$. Find the maximum distance through which the spring will be compressed?

Define astronomical telescope. Write down its construction, working and magnifying power.

In a double slit experiment the second order maxima occurs at $\theta ={0.25}^{\circ }$. The wavelength is $650\mathrm{n}\mathrm{m}$. Determine the slit separation.