List of top Physics Questions

There is no accumulation of electric charges at any junction in an electric circuit. Which law states this?
Which of the following mirrors is used by a dentist to examine a patient's teeth?

A straight conductor carries a current of 10 A. The magnetic field at a distance of 2 cm from the wire is: (μ₀ = 4 × 10⁻⁷ T m/A)

A coil of 100 turns and area 0.01 m² is placed perpendicular to a uniform magnetic field that increases uniformly from 0 to 0.2 T in 0.1 s. What is the magnitude of the induced EMF in the coil?
The ratio of the velocity of light in a vacuum to that in a medium is?
The velocity of light through a medium of relative permittivity 2 and relative permeability 4.5 is (in terms of $ c $):
Chromatic aberration arises in their lens due to:
What is the angle between the current and the magnetic field if a conductor carrying 2A current placed in a magnetic field of 4T experiences a force of 10N?
A light is incident on a surface having refractive index $ \frac{4}{3} $ and reflected light is completely polarised. $ \left( \tan 53^\circ = \frac{4}{3} \right) $. What is the angle of incidence?
The inward electric flux through a closed surface is \( 6 \times 10^{-5} \) and the outward flux is \( 3 \times 10^{-5} \). Then the total charge enclosed is?
Electrostatic force is maximum when charge \( Q \) is placed at ------?
Two charged conducting spheres of radii 5 cm and 10 cm have equal surface charge densities. If the electric field on the surface of the smaller sphere is E, then the electric field on the surface of the larger sphere is
If the energy stored in a spherical conductor having a charge of \( 12 \, \mu C \) is \( 6 \, \text{J} \), then the radius of the spherical conductor is:
If 27 identical charged conducting spheres, each of capacitance \( 10 \mu F \), combine to form a big sphere, then the capacitance of the big sphere is:
Three particles of each charge $q$ are placed at the vertices of an equilateral triangle of side $L$. The work to be done to decrease the side of the triangle to $\dfrac{L{2}$ is}
State the formula for angle of banking.
A body of mass 0.8 kg performs linear S.H.M. It experiences a restoring force of 0.4N, when its displacement from mean position is 4 cm. Determine Force constant and Period of S.H.M.
A charge \( q \) enters with speed \( v \) in the direction of magnetic field \( B \). The force on the charge in magnetic field will be:
The angle between polarization plane and direction of propagation of electromagnetic waves is :
Resistance of an ideal p-n junction diode in reverse bias is:

With the help of the given circuit, find out the total resistance of the circuit and the current flowing through the cell.

 

Define self inductance.
Using Newton's law of viscosity for streamline flow, derive an expression for coefficient of viscosity.
If the speed of light in glass is $ 2 \times 10^8 \, m/s $ and the speed of light in air is $ 3 \times 10^8 \, m/s $, the refractive index of glass with respect to air is:
In resonance condition, the frequency of L-C circuit is