List of top Physics Questions

Gases exert pressure on the walls of the container because the gas molecules

From the top of tower, a stone is thrown up. It reaches the ground in $t_1$ s. A second stone thrown down with the same speed reaches the ground in $t_2$ s. A third stone released from rest reaches the ground in $t_3$ s. Then

From the top of a tower, a particle is thrown vertically downwards with a velocity of 10 m/s. The ratio of distances covered by it in the 3rd and 2nd seconds of its motion is (Take g = $10 m/s^2$)

Frequency modulation is preferred over amplitude modulation for transmission of music because

Frequencies in the $UHF$ range normally propagate by means of

Four identical hollow cylindrical columns, support a big structure of mass $M$ . The inner and outer radii of a column are $R_{1}$ and $ R_{2}$ respectively. Assuming the load distribution to be uniform, the compressional strain of each column is (where $Y$ is Young?? modulus of the column)

Four girls skating on circular ice ground of radius $200\,m$ start from a point $P$ on the edge of the ground and reach a point $Q$ diametrically opposite to $P$ following different paths as shown in figure. For which girl displacement is equal to the actual length of path?

Four identical mirrors are made to stand vertically to form a square arrangement as shown in a top view. A ray starts from the midpoint $M$ of mirror $AD$ and after two reflections reaches corner $D$. Then, angle $\theta$ must be

Force displacement graph of a particle stating from rest is given in the figure shown, The kinetic energy of particle at x= 3m is

Force acting on a particle is $5\, N$. If the units of length and time are doubled and unit of mass is halved, then numerical value of the force in the new system will be

For transmission of e.m.wave of audible frequency, these waves are superimposed with waves of

For observing diffraction it is essential to have

For any arbitrary motion in space, which of the following relations is true? (The average stands for average of the quantity over the time interval $t_1$ to $t_2$)

For a single side band transmission a balanced modulator is used to

For a transistor amplifier in common emitter configuration for load impedance of $1\,k\Omega$ ($h_{fe} = 50$ and $h_{oe} = 25\, mA\, V^{-1}$), the current gain is

For a particle performing uniform circular motion, choose the incorrect statement from the following.

Following law/laws is/are basic law/laws

Find the magnifying power of a compound microscope whose objective has a focal power of 100 D and eyepiece has a focal power of 16 D when the object is placed at a distance of 1.1 cm from the objective. Assume that the final image is formed at the least distance of distinct vision, 25 cm.

Find maximum height upto which v will move on inclined plane. All surfaces are smooth

Find corresponding velocity-time graph for given displacement time graph

Figure shows $(x, t), (y, t)$ diagram of a particle moving in 2-dimensions.

If the particle has a mass of 500 g, the force acting on the particle is

Figure shows a man of mass $55\, kg$ standing stationary with respect to a horizontal conveyor belt that is accelerating with $1\,m$ $s^{-2}$. The net force acting on the man is

Fig shows the time-displacement curve of the particles P and Which of the following statement is correct?

Ferromagnetic materials have their properties due to

Fermi energy is the maximum energy of an electron in the band at :