List of top Physics Questions

The velocity of a travelling plane wave given by \[ y = 10^{-2} \sin \left( 200t - \frac{x}{5} \right) m, \] is

The instantaneous displacement of a particle executing simple harmonic motion is given by $x = 2(\cos(\pi t) + \sin(\pi t))$.
The amplitude of oscillation is

The average kinetic energy per molecule of an ideal gas at $27^\circ C$ is $E$. The temperature of the gas at which the average kinetic energy per molecule will be $2E$ is

The pressure of an ideal gas is proportional to the cube of its temperature (on absolute scale) in an adiabatic process. Then the value of the ratio $C_p/C_v$ is

When water is heated from $0^\circ$C to $8^\circ$C, its volume

Two perfectly black bodies are at temperatures $ T $ and $ 2T $. The ratio between the wavelengths corresponding to maximum energy emission by the two black bodies is

When two different liquids of same mass but at two different temperatures $27^\circ C$ and $47^\circ C$ are mixed together, the resulting temperature of the mixture is $35^\circ C$. The ratio of their specific heat capacities is

The energy stored in a soap bubble of diameter 4 cm is nearly (surface tension of soap solution is 0.07 N/m)

Which of the following has the maximum Young’s modulus value?

The gravitational potential energy of a system of two bodies each of mass $m$ and distance $r$ between them is (G = gravitational constant, g = acceleration due to gravity)

The radius of gyration of a regular solid cylinder of radius $R$ about its axis is

If $P$ is the pressure at which the heart is pumping the blood and the volume of blood pumped per second is $V$, then the power of the heart is given by

When a spring of spring constant $k$ is cut into two pieces whose lengths are $l_1$ and $l_2$, then the ratio of their spring constants $k_1$ and $k_2$ is

In a ‘tug of war’ game, two persons pull each other through a massless rope. The person who wins is

A particle is describing a uniform circular motion with a certain constant speed. The INCORRECT statement is

Dimensions of the physical quantity $X$ in the equation \[ {Force} = \frac{X}{{Volume}} \] are

What is the difference between nuclear fission and nuclear fusion? Explain each of them with the help of an appropriate example. Why is in both incidents the nuclear energy released?

Focal length of each lens is 10 cm as shown in the given figure. Find the distance of the image of point object O from the convex lens and also draw the ray diagram. If both lenses are placed in contact, what will be the power of the combined lens?

State the required conditions for the interference of light. Find the value of maximum resultant intensity of two waves having intensities $ I $ and $ 4I $, when sources are (i) coherent and (ii) non-coherent.

A monochromatic ray of light is incident at an angle of $ 45^\circ $ on the face AB of a right-angled prism ($ A = 90^\circ $), as shown in the figure. The emergent ray is refracted tangentially from the face AC. Find out the refractive index of the prism material.

What are Kirchhoff's two laws for the electrical circuit? Find out the reading of the ammeter with the help of the given circuit, while its resistance is negligible.

In the given circuit, A.C. source is given by: \[ V = 282 \sin (100 \pi t) \text{ volt} \] The internal resistance of the source is $ 2000 \, \Omega $.

Find out:

(i) rms value of source voltage
(ii)inductive reactance of the circuit
(iii) impedance of the circuit

Find the magnitudes of currents $ i_1 $, $ i_2 $, and $ i $ with the help of the given circuit, when (i) just at the moment switch S is pressed and (ii) S is pressed for a long time.

Current of 5 mA is flowing in the given circuit. Find the value of the resistor $ R $.

Whether the $ p\text{-}n $ junction diode is forward biased or reverse biased in the given figure.