CDS Physics Questions

Which one of the following statements qualitatively explains the second law of motion?

Which one of the following gives the triple point of water?

An X-ray beam can be deflected by :

Which one among the following has the least coefficient of thermal conductivity?

An object is placed at a distance of 15 cm in front of a concave mirror with a radius of curvature of 20 cm. Which one among the following statements is correct for the image formed?

Which one among the following statements related to electric cells is correct ?

Consider the following statements regarding waves :

1. If the particles of a medium move along the direction of motion of the wave, the wave is called a longitudinal wave.
2. If the particles of a medium move perpendicular to the direction of motion of the wave, the wave is called a transverse wave.
3. Transverse waves may involve change in the shape of the medium, whereas longitudinal waves involve change in the density of the medium.
   Which of the statements given above is/are correct ?

Which one among the following statements regarding the electrical resistivity of a conducting wire is correct ?

An object is launched horizontally from a height of 45 m above the ground with a speed of 10 m/s. The time at which the object will hit the ground is : (Take g = 10 m/s^2)

Assume 'A' does 500 J of work in 'x' minutes and 'B' does 1000 J of work in 20 minutes. If the power delivered by 'A' is P1 and 'B' is P2 and P1 = 2P2, then 'x', in minutes, is :

Van de Graaff generator generates :

The rule to determine the direction of a current induced in a coil due to its rotation in a magnetic field is :

An X-ray can be deflected :

In a simple astronomical telescope, the objective and the eyepiece used respectively, are :

Twinkling of a star is due to :

Which one of the following is not a property of 'graphene' ?

A car travels a total distance L. It travels half the distance with speed $v_1$ and the other half with speed $v_2$. The average speed of the car is :

The linear momentum of a particle is conserved if :

When a stone tied to a string is whirled in a circle, the work done on it by the string :

A sound wave travelling at a speed of 330 m/s produces 20 crests and 20 troughs in 0.1 second. The wavelength of the sound wave is :