List of top Physics Questions

If m and 2m are two masses separated by a distance of 1 m are attracted by gravitational force. Then the acceleration of their centre of mass is?
When a ball of mass 2.2 kg collides with a wall with a speed of 10 m/s and rebounds with a speed of 8 m/s. Find impulse.
If a magnet is cut into equal halves perpendicularly. What happens to magnetic moment?
Two cars A and B are starts moving from rest. Car A travels at a constant velocity of 20 m/s and car B moving with a constant acceleration of 4 m/s$^2$. After how much time B will overtake A?
In vertical circular motion, what is the minimum velocity at the lowest point?
An object is placed at a distance of 30 cm from a convex lens of focal length 100 cm when it moves 5 cm towards the lens how much is the image being shifted?
The maximum and minimum distances of a planet from sun are $r_1$ and $r_2$ respectively. If minimum velocity is $V_1$ and minimum velocity is $V_2$, then the ration $V_1 : V_2$ is:
A block of mass 2kg slides on a rough horizontal surface ($\mu_k = 0.2$) with initial speed 10m/ s. Find the stopping distance
Area under velocity- time graph of a particle is equal to
In ac circuit containing an ac source of frequency f, the capacitance is proportional to
A solenoid has 1000 turns per meter and carries a current of \( \frac{7}{\pi} \) A. The magnetic field inside the solenoid is
The direction of electric field at a point just outside a positively charged spherical conductor is
If kinetic energy of one mole of monatomic gas is 24.4J, then temperature is(R = 8.314)
In Bohr's theory of hydrogen atom if speed of an electron in the first orbit is v, then the speed in 3rd orbit is
A circular coil of radius 10cm with 200 turns is placed $\perp$r to uniform magnetic field of 1.4T. IF magnetic field reduced to zero in 0.2s, what is the average induced emf
If resistance of a conductor at $20^\circ$C is $10\Omega$, then the resistance at $80^\circ$C is $[\alpha = 4 \times 10^{-3} \ ^\circ\text{c}^{-1}]$
If T is the time period of satellite in an orbit of radius r, then the time period in an orbit of radius 3r is:
If rms speed is increased 20% and volume is kept constant, then increase in pressure is
Force acting on a particle varies with time \( t \) as \( F = kt \), where \( k \) is a constant. The velocity of the particle after a time \( t \) is
Ripple frequency of a full wave rectifier is
A brass of length 1m is heated throught a temperature rise of $50^\circ$C. Find thermal stress developed in the rod
$(\alpha = 2 \times 10^{-5} \ ^\circ\text{c}^{-1}, Y = 1 \times 10^{11} \text{ N/m}^2)$
Two bodies of same mass having temperature $T_1$ and $T_2$ place kept contact. Specific heat capacity of bodies are s and 1.2s respectively. find equilibrium temperature.
Two identical cells having internal resistance $1\Omega$ and emf 6v and 2v are connected in series with external resistance $4\Omega$, find current throught external resistance
64 identical spheres each having charge q coalesce to form one big sphere. Find the ratio of the surface charge density of the big sphere to that of small sphere
Energy of radiation incident on a perfect absorbing surface per unit are in unit time is 3.6J. The radiation pressure is: