List of top Physics Questions

A force $ F = 3x^2 + 2x + 1 $ acts on a body in the $ x $ -direction. The work done by this force during a displacement from $ x = -1 $ to $ +1 $ is

Find the current drawn from the battery just after the switch is closed

For a particle in SHM, the displacement x of the particle as a function of time t is given as x = A sin (2 pt) Here x is in cm and t is in seconds. Let the time taken by the particle to travel from x = 0 to x = A/2 be t and the time taken to travel from x = A/2 to x = A be t. Find t/t

If same charge q is placed inside a sphere and cube having radius 1m and side 2m respectively. What will be the ratio of flux passing through them ?

An electric current ?I? enters and leaves a uniform circular wire of radius r through dfiametrically opposite points. A particle carrying a charge q moves along the axis of the circular wire with speed v. What is the magnetic force experienced by the particle when it passes through the centre of the circle ?

The maximun value of the applied force $F$ such that the block as shown in the arrangement does not move is (Acceleration due to gravity, $g=10 \,ms ^{-2}$ )

A moving block having mass $m$, collides with another stationary block having mass $4\,m$. The lighter block comes to rest after collision. When the initial velocity of the lighter block is $v$, then the value of coefficient of restitution (e) will be

The density of O₂ is 16 at NTP. At what temperature its density will be 14?consider that the pressure remain the constant at

In a flask of 'V' litres, 0.2 moles of O₂, 0.4 moles of N₂, 0.1 moles of NH₃ and 0.3 moles of He gases are present at 27^oC. If total pressure exerted by these non-reaching gases is 1 atm, the partial pressure exerted by N₂ gas is

A piece of an ancient wooden boat shows an activity of C¹⁴ of 3.9 disintegrations per minute per gm of carbon. Estimate the age of the boat, if the half life of C¹⁴ is 5.568 years. Assume that the activity of fresh carbon -14 is 15.6 dpm.gm

X-rays of wavelength 1.14 A in the first order reflection from a crystal, were reflected at an angle of 30^o.
The inter planar distance in the crystal is (Sin 30^ois 0.5)

Which of the following transitions in hydrogen atoms emit photons of highest frequency?

The most widely used rectifier is

When boron \(_{5}B^{10}\) is bombarded by neutron, alpha particles are emitted. The resulting nucleus has the mass number.

Connecting a lead from the negative to the positive of a battery will produce

A pair of coil has a mutual inductance of 2 H, if the current in the primary changes from 10 A to zero in 0.1 S, the induced emf in the secondary will be

If ionising energy of H atom is 13.6eV, then the second ionising energy of He should be

The frequency of the charged particle circular at right angles to a uniform magnetic field does not depend upon the

The unit of relative permittivity is

The ratio of the radii of the nuclei \(_{13}Al^{27}\) and \(_{52}Te^{125}\) is approximately

An electron in Bohr's hydrogen atom has an energy of -3.4 eV. The angular momentum of the electron is:

Radiation of two photons having energies twice and five times the work function of a metal are incident successively on the metal surface.Find out the ratio of maximum velocity of photo electrons emitted in the two cases.

What determines the charge that flows through a circuit due to the induced emf?