List of top Physics Questions

Two point charges +2C and +6C repel each other with a force of 12 N. If a charge of - 2C is given to each of these charges the force will now be
A thin straight vertical conductor has 10 amp current flows vertically upwards. It is present at a place where $B_H = 4 \times 10^{-6}T$ . Arrange the net magnetic induction at the following points in ascending order a) at 0.5m on south of conductor b) at 0.5ra on west of conductor c) at 0.5m on east of conductor d) at 0.5m on north-east of conductor
Among the given pair of vectors, the resultant of two vectors can never be 3 units. The vectors are
A ray of light passes through a glass slab with refractive index \( n = 1.5 \) at an angle of incidence of \( 30^\circ \). What is the angle of refraction inside the glass? (Use \( \sin 30^\circ = 0.5 \))
We have carefully distinguished between average speed and magnitude of average velocity. No such distinction is necessary when we consider instantaneous speed and magnitude of velocity. The instantaneous speed is always equal to the magnitude of instantaneous velocity. Why?

A bullet from a gun is fired on a rectangular wooden block with velocity u. When the bullet travels 24 cm through the block along its length horizontally, velocity of the bullet becomes \(\frac{u}{3}\).Then it further penetrates into the block in the same direction before coming to rest exactly at the other end of the block. The total length of the block is

A spherical conductor of radius 12 cm has a charge of 1.6 × 10–7C distributed uniformly on its surface. What is the electric field ?
  1. inside the sphere
  2. just outside the sphere
  3. at a point 18 cm from the centre of the sphere?
A spherical object of radius \( R \) is placed in a uniform electric field \( E \). If the dielectric constant of the material of the object is \( K \), find the induced charge on the surface of the object.
The electric current flowing through a given conductor varies with time as shown in the graph below. The number of free electrons which flow through a given cross-section of the conductor in the time interval 0 ≤ t ≤ 20s is
The electric current flowing through a given conductor
Trajectories of two projectiles are shown in figure. Let $T_{1}$ and $T_{2}$ be the time of flight and $u_{1}$ and $u_{2}$ are their speeds of projections, then
An object, moving with velocity $5\,m / s$, undergoes an acceleration of $1\,m / s ^{2}$ at time $t=0 .$ If the object has a mass of $1\,kg$, the kinetic energy ( KE) of the object at time $t=5\, s$ is
A body of mass 5 kg is initially at rest on a smooth horizontal surface. A constant force of 20 N is applied to the body. Find the acceleration of the body and the distance traveled by the body in 10 seconds.
Two blocks of masses 8 kg and 5 kg are connected with a rod of mass 3 kg (see figure). The upper block is pulled up with a force of 180 N. The tension in the rod in contact with the upper block is
A uniform magnetic field of strength B =2mT exists vertically downwards. These magnetic field lines pass through a closed surface as shown in the figure. The closed surface consists of a hemisphere S1 , a right circular cone S2 and a circular surface S3 . The magnetic flux through S1 and S2 are respectively
A uniform magnetic field
A cube of side 1 cm contains 100 molecules each having an induced dipole moment of 0.2×10-6C-m in an external electric field of 4NC-1. The electric susceptibility of the materials is_____ C2N-1m-2
If we apply $ 10 \, \text{N $ of force on an object, then the acceleration produced is $ 2.5 \, \text{m/s}^2 $. What is the mass of the object?}
If we walk on Ice its not easy for us why?
An object has a mass of $ 120 \, \text{kg $ on Earth. What is the mass of the object on the Moon?}
When we beat a carpet by stick the dust particles come out. Which law of motion works here ?
What is the 'SI' unit of acceleration ?

In this graph which line (A or B) show high velocity :

For which colour of light, the angle of deviation by a prism is maximum ?
An object mass is 'M' and Velocity is 'V'. What is the momentum of the object :
An object travels 25 m in 5 s and then travels 25 m in 3 s. What is the average speed of the object?
A train is moving at a constant speed of \( 54 \, \text{km/h} \). What is the speed of the train in \( \text{m/s} \)?