List of top Physics Questions

What happens to a ferromagnetic material when its temperature is raised above Curie temperature?
If current through a single circular loop of radius 10 cm produces a magnetic field of \( B \, \text{Tesla} \) at the centre, what is the current through the loop?
A couple can result in which type of motion:
Which force holds the nucleons together in the nucleus of the atom?
A body starting from rest moves with a constant acceleration of \( 2 \, \text{m/s}^2 \). What is the distance covered by the body in the interval between 5 s and 6 s?
Two lenses, one of focal length 20 cm and another of power 4D are placed together, what is the effective power of the combination?
If the de Broglie wavelength of \( \alpha \)-particle and proton are equal, then the momentum \( P \) and kinetic energy \( E \) are related as:
A constant force acts on a body at rest, resulting it to move with constant acceleration. If power relates to time as \( P \propto t^n \), what is the value of \( n \)?
If two planets A and B have their densities in the ratio 2:1 and radii in the ratio 1:2, what will be the ratio of escape velocities from their surfaces?
For an elastic collision
For an elastic collision
Transformer core is laminated because:
If \( I = 16 \, \text{A} \), electron density \( n = 5 \times 10^{23} \, \text{m}^{-3} \), and \( A = 1 \times 10^{-7} \, \text{m}^2 \), find the drift velocity.
Transformer core is laminated because:
Current in a circuit is 0.6 A when an external resistance of \( 3 \, \Omega \) is connected. When the external resistance is changed to \( 6 \, \Omega \), current in the circuit becomes 0.4 A. Find the internal resistance of the cell.
Which of the following statement is correct for EM wave:
Bernoulli's principle is applicable for:
If a proton is displaced by 5m in an electric field of \(50 \, \text{N/C}\), what is the work done by the electric field?
At a certain height \( h \) from the surface of Earth, the value of acceleration due to gravity is \( \frac{g}{9} \), where \( g \) is the acceleration due to gravity at the surface. What is the value of \( h \) in terms of the radius of Earth \( R \)?
What should be connected in the circuit to remove ripples in AC:
Given \( I = 2A \), \( \phi = 10^{-2} \, \text{weber} \), \( N = 1000 \), calculate the self-inductance.
A particle of charge equal to 10 times the charge of an electron revolves in a circle with frequency equal to 10 revolutions per second. Find the magnetic field at the centre of the circular path.
What is the ratio of the longest wavelength in Lyman and Balmer series?
If \( I = 2 \, \text{A}, \, \phi = 10^{-2} \, \text{Weber}, \, N = 1000 \), calculate the self-inductance.
What should be connected in the circuit to remove ripples in AC: