List of top Physics Questions

The plot of the function f(x) = ||x| - 1| is

The state of a harmonic oscillator is given as Ψ =$\frac{1}{ √3}$ 𝜓₀ -$\frac{1}{ √6}$ 𝜓₁+$\frac{1}{ √2}$ 𝜓₂ , where 𝜓₀, 𝜓₁ and 𝜓₂ are the normalized wave functions of ground, first excited, and second excited states, respectively. Which of the following statement(s) is/are true?

For a cubic unit cell, the dashed arrow in which of the following figures represents the direction [220] ?

In the given circuit, with an ideal op-amp for what value of $\frac{R_1}{R_2}$ the output of the amplifier V_out = V₂ - V₁ ?

For the following circuit, choose the correct waveform corresponding to the output signal (V_out). Given V_in = 5 sin(200πt) V, forward bias voltage of the diodes (D and Z) = 0.7 V and reverse Zener voltage = 3 V.

A wave travelling along the x-axis with y representing its displacement is described by (𝑣 is the speed of the wave)

Rain is falling vertically with a speed of 40 $m s^{-1}$. Wind starts blowing with a speed of 16 $m s^{-1}$ in the west to east direction. How should a person, who is standing, hold his umbrella to avoid getting wet?

In a moving coil galvanometer if the number of turns increases by 25%, then change in voltage sensitivity is?

Two charged particles, having same kinetic energy, are allowed to pass through a uniform magnetic field perpendicular to the direction of motion If the ratio of radii of their circular paths is $6: 5$ and their respective masses ratio is $9: 4$ Then, the ratio of their charges will be :

R₁ = (15 ± 0.5) Ω
R₂ = (10 ± 0.5) Ω
Find % error in equivalent resistance if resistors R₁ and R₂ are connected in parallel ?

Density (p) of a body depends on the force applied (F), its speed (v) and time of motion (t) by the relation p = KF^av^bt^c , where K is a dimensionless constant. Then

If the position of a particle is changing with time as r=t²-2t (m). Find the velocity at t=2s.

A Particle is projected vertically upward reaches 136 m height. What will be the maximum range for the particle projected with same speed ?

Find the radius of the orbit corresponding to the 4th excited state in Li++. (a0 is the radius of first orbit in H-atom)

Let $\eta_1$ is the efficiency of an engine at $T _1=447^{\circ} C$ and $T _2=147^{\circ} C$ while $\eta_2$ is the efficiency at $T _1=947^{\circ} C$ and $T _2=47^{\circ} C$ The ratio $\frac{\eta_1}{\eta_2}$ will be :

In a thermodynamic process work done by gas is 1000 J & heat supplied is 200 J. Find change in internal energy of gas?

Pressure for polytropic process P varies with volume V as P=av-3, find out the bulk modulus.

Ratio between rms speed of Ar to the most probable speed of $O^2$ at $27\degree C$ is

For two different photosensitive materials having work function and 2 respectively, are illuminated with light of sufficient energy to emit electrons. If the graph of stopping potential versus frequency is drawn, for these two different photosensitive materials the ratio of slope of graph for these two materials is

Light wave travelling in air along $x$-direction is given by $E_y=540 \sin \pi \times 10^4(x-c t) Vm ^{-1}$ Then, the peak value of magnetic field of wave will be (Given $c =3 \times 10^8 ms ^{-1}$ )

Choose the correct options based on the column shown below.

1.	TV signal	(P)	12 GHz
2.	Satellite	(Q)	30 MHz
3.	AM	(R)	88 MHz
4.	FM	(S)	1 MHz

Force acting on a particle moving along the x - axis is given by F = (2 + 3x)i. The work done by this force from x = 0 to x = 4 m is

A body of mass $05\, kg$ travels on straight line path with velocity $v=\left(3 x^2+4\right) m / s$ The net workdone by the force during its displacement from $x =0$ to $x =2 \,m$ is :

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Earth has atmosphere and moon doesn’t
Reason (R): escape speed on moon is less than that of Earth.
In the light of the above statements, choose the correct answer from the options given below:

A planet has density same as that of Earth and mass is twice that of Earth. If the weight of an object on Earth is "W" then the weight on the planet is: