List of top Physics Questions

A car of mass 1000 kg having a velocity of 10 m/s collides a horizontally mounted spring. If the spring constant is 4000 N/m, then the maximum compression of the spring is
The mass of one mole of a gas is $22.4 \times 10^{-3}$ kg and its specific heat ratio is 1.6. The speed of sound in the gas at STP is nearly
In the given circuit, if the current flowing through 5 \( \Omega \) resistor is 0.5 A, then the value of \( E \) is:
current flowing through 5 Ω resistor is 0.5 A
A 25 \(\Omega\) resistor and inductor in series with voltage \( V = 100\sin(100\pi t) \), impedance = 50 Ω. Find average power:
In a potentiometer experiment, the balancing length with a cell is \(240~\text{cm}\). On shunting the cell with \(2~\Omega\), the balancing length becomes \(120~\text{cm}\). The internal resistance of the cell is
Two vectors of same magnitude act at a point. Twice the product of the magnitudes of two vectors is equal to the square of the magnitude of their resultant. The angle between the two vectors is:
A body thrown vertically upwards with a velocity of 20 ms\(^{-1}\) from the surface of a planet reaches back the surface of the planet in a time of 2 s. The time period of a simple pendulum of length \( \frac{20}{\pi^2} \) m on this planet is
Consider a tightly wound 100 turn coil of radius 10 cm carrying a current of 2A. The magnitude of the magnetic field at the ntre of the coil is
The mechanical energy of a damped oscillator becomes half of its initial energy in 4 seconds. In another \( t \) seconds its mechanical energy becomes 12.5\% of its initial mechanical energy. Then \( t = \):
Assuming the earth to be a sphere of uniform mass density, the weight of a body at a depth \(d=\frac{R}{2}\) from the surface of earth, if its weight on the surface of earth is 200 N, will be 
A radioactive nuclei X decays simultaneously to two nuclei Y and Z as:
radioactive nuclei X decays
t½ is 12 minutes while t'½ is 3 minutes. Find the time in which nuclei X decays 50%.
Pick the correct graph between potential V at distance r from centre for the uniformly charged spherical shell of radius R.
 
graph
Mass of body = 500 kg,  μ= 0.7. Find work required to move a distance of 4 Km if the body moves with velocity 10 m/s.
Match the physical quantity in column-I with the respective dimension in column-II and choose the correct option.
 Column-I Column-II
I.Spring constant(P)[ML2T0 ]
II.Moment of inertia(Q)[M0L0T–1 ]
III.Angular momentum(R)[ML0T–2 ]
IV.Angular speed(S)[ML2T–1 ]
The length of a conductor having resistance 160 Ω, is compressed to 25% of its initial value. The new resistance will be
Statement I : In LCR circuit, by increasing frequency current increases first then decreases.
Statement II : Power factor of LCR circuit is one.
Choose the correct option.
Assertion (A): An electrical dipole is enclosed in a closed gaussian surface. The total flux through the enclosed surface is zero. 
Reason (R): Net charge inside the enclosed surface is zero.
A circular ring is placed in magnetic field of 0.4 T. Suddenly its radius starts shrinking at the rate of 1 mm/s. Find the induced emf in the ring at r = 2 cm.
Bob P is released from the position of rest at the moment shown. If it collides elastically with an identical bob Q hanging freely then velocity of Q, just after collision is (g = 10 m/s2).
Position-time graph for a particle is parabolic and is as shown:
Position-time graph for a particle is parabolic

Choose the corresponding v – t graph.
For a system undergoing isothermal process, heat energy is supplied to the system. Choose the option showing correct statements
(a) Internal energy will increase
(b) Internal energy will decrease
(c) Work done by system is positive
(d) Work done by system is negative
(e) Internal energy remains constant
The heat passing through the cross-section of a conductor, varies with time ‘t’ as \(Q(t) = αt – βt^2 + γt^3\). (\(α, β\) and \(γ\) are positive constants.) The minimum heat current through the conductor is
Momentum-time graph of an object moving along a straight line is as shown in figure. If (P2 – P1) < P1 and (t2 – t1) = t1 < (t3 – t2) then at which points among A, B and C the magnitude of force experienced by the object is maximum and minimum respectively.
Momentum-time graph of an object moving along a straight line
A particle moving in unidirectional motion travels half of the total distance with a constant speed of 15 m/s. Now first half of the journey time it travels at 10 m/s and second half of the remaining journey time it travels at 5 m/s. Average speed of the particle is
A bullet strikes a stationary ball kept at a height as shown. After collision, range of bullet is 120 m and that of ball is 30 m. Find initial speed of bullet. Collision is along horizontal direction. 
(Take g = 10 m/s2)
A bullet strikes a stationary ball kept at a height