List of top Physics Questions

Let $\gamma_1$be the ratio of molar specific heat at constant pressure and molar specific heat at constant volume of a monoatomic gas and $\gamma_2$ be the similar ratio of diatomic gas. Considering the diatomic gas molecule as a rigid rotator, the ratio, $\frac{\gamma_1}{\gamma_2}$ is :

When a beam of white light is allowed to pass through convex lens parallel to principal axis, the different colours of light converge at different point on the principle axis after refraction. This is called :

The velocity-time graph of a body moving in a straight line is shown in the figure.

The ratio of displacement to distance travelled by the body in time 0 to 10s is:

A long solenoid is formed by winding 70 turns/cm. If 2.0 A current flows, then the magnetic field produced inside the solenoid is:

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$
Assertion A: Steel is used in the construction of buildings and bridges.
Reason R: Steel is more elastic and its elastic limit is high.
In the light of above statements, choose the most appropriate answer from the options given below:

The frequency ($ \nu $) of an oscillating liquid drop may depend upon the radius ($ r $) of the drop, density ($ \rho $) of the liquid, and the surface tension ($ s $) of the liquid as: \[ \nu = k r^a \rho^b s^c \]
The values of $ a $, $ b $, and $ c $ respectively are:

The electric field and magnetic field components of an electromagnetic wave going through vacuum are described by:
\[ E_x = E_0 \sin(kz - \omega t), \quad B_y = B_0 \sin(kz - \omega t). \]
Then the correct relation between $ E_0 $ and $ B_0 $ is given by:

Given below are two statements:

Assertion (A): A pendulum clock when taken to Mount Everest becomes fast.
Reason (R): The value of $ g $ (acceleration due to gravity) is less at Mount Everest than its value on the surface of Earth.

In the light of the above statements, choose the most appropriate answer from the options given below:

If the distance of the Earth from the Sun is $ 1.5 \times 10^6 \, \text{km} $, then the distance of an imaginary planet from the Sun, if its period of revolution is $ 2.83 \, \text{years} $, is:

In an LC oscillator, if values of inductance and capacitance become twice and eight times, respectively, then the resonant frequency of oscillator becomes $x$ times its initial resonant frequency $\omega_0$ The value of $x$ is:

A solenoid of $1200$ tums is wound uniformly in a single layer on a glass tube $2\, m$ long and $02\, m$ in diameter The magnetic intensity at the center of the solenoid when a current of $2 A$ flows through it is:

The distance travelled by a particle is related to time $t$ as $x=4 t^2$ The velocity of the particle at $t-5 s$ is:-

According to law of equipartition of energy the molar specific heat of a diatomic gas at constant volume where the molecule has one additional vibrational mode is:-

For a moving coil galvanometer, the deflection in the coil is $005$ rad when a current of $10 \,mA$ is field is $0,01 \,T$ and the number of turns in the coil is $200$ , the area of each tum (in $cm ^2$ ) is :

Statement I: When a Si sample is doped with Boron, it becomes P type and when doped by Arsenic it becomes N-type semi conductor such that P-type has excess holes and N-type has excess electrons.
Statement II: When such P-type and N-type semi-conductors, are fused to make a junction, a current will automatically flow which can be detected with an externally connected ammeter.
In the light of above statements, choose the most appropriate answer from the options given below

Two objects are projected with same velocity ' $u$ ' however at different angles $\propto$ and $\beta$ with the horizontal If $\alpha+\beta=90^{\circ}$, the ratio of horizontal range of the first object to the 2nd object will be :

The graph between two temperature scales $P$ and $Q$ is shown in the figure Between upper fixed point and lower fixed point there are 150 equal divisions of scale $P$ and 100 divisions on scale $Q$ : The relationship for conversion between the two scales is given by:-

Every planet revolves around the sun in an elliptical orbit:-
A. The force acting on a planet is inversely proportional to square of distance from sun
B. Force acting on planet is inversely proportional to product of the masses of the planet and the sun
C. The Centripetal force acting on the planet is directed away from the sun
D. The square of time period of revolution of planet around sun is directly proportional to cube of semi-major axis of elliptical orbit
Choose the correct answer from the options given below:

Match List I with List II

List I		List II
A.	Troposphere	I.	Approximate 65-75 km over Earth’s surface
B.	E- Part of Stratosphere	II.	Approximate 300 km over Earth’s surface
C.	F2- Part of Thermosphere	III.	Approximate 10 km over Earth’s surface
D.	D- Part of Stratosphere	IV.	Approximate 100 km over Earth’s surface

Choose the correct answer from the options given below:

The light rays from an object have been reflected towards an observer from a standard flat mirror, the image observed by the observer are:-
A. Real
B. Erect
C. Smaller in size then object
D. Laterally inverted
Choose the most appropriate answer from the options given below:

A body of mass is taken from earth surface to the height $h$ equal to twice the radius of earth $\left(R_e\right)$ the inerease in potential energy will be:( $g$ = acceleration due to gravity on the surface of Earth)

The energy levels of an atom is shown in figure:

Which one of these transitions will result in the emission of a photon of wavelength $1241\, nm$ ? Given $\left( h =6.62 \times 10^{-34} Js \right)$

A bowl filled with very hot soup cools from $98^{\circ} C$ to $86^{\circ} C$ in 2 minutes when the room temperature is $22^{\circ} C$. How long it will take to cool from $75^{\circ} C$ to $69^{\circ} C$ ?

A solenoid of $1200$ tums is wound uniformly in a single layer on a glass tube $2\, m$ long and $02\, m$ in diameter The magnetic intensity at the center of the solenoid when a current of $2 A$ flows through it is:

A sample of gas at temperature $T$ is adiabatically expanded to double its volume The work done by the gas in the process is (given, $\gamma=\frac{3}{2}$)