List of top Physics Questions

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?}
What is the 'SI' unit of acceleration ?
For which colour of light, the angle of deviation by a prism is maximum ?
What does the odometer of vehicle measure?

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

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 \( \text{m/s} \)?
Focal length of a plane mirror is :
The cause of twinkling of stars is:
Blue colour of sky is due to :
A mirror forms a virtual and diminished image. It is a :
Myopia is corrected by using :
A convex lens forms the image of sun at :
Speed of light in vacuum is:
The north and south poles of a magnet:
Which one is not true for magnetic field lines ?
At the time of short circuit, the current in the circuit is :
The device used for producing electric current is called:
An electromagnet is :
Strength of magnetic field produced by a current carrying solenoid depends upon :
Electric current produces :
(a) Explain the meaning of the statement ‘electric charge of a body is quantised’.
(b) Why can one ignore quantisation of electric charge when dealing with macroscopic i.e., large scale charges?

Figure shows a capacitor made of two circular plates each of radius 12 cm, and separated by 5.0 cm. The capacitor is being charged by an external source (not shown in the figure). The charging current is constant and equal to 0.15 A.

  1. Calculate the capacitance and the rate of charge of potential difference between the plates.
  2. Obtain the displacement current across the plates.
  3. Is Kirchhoff’s first rule (junction rule) valid at each plate of the capacitor? Explain.
capacitor made of two circular plates
An artificial satellite revolves around earth in circular orbit of radius r with time period of orbit T. The satellite is made to stop in the orbit which makes it fall into earth. Time of fall of the satellite onto earth is given by