COMEDK 2025 Physics Most Important Topics and Questions

Centre of Mass, Impulse, and Momentum

Capacitance

Units Dimensions Errors

Gravitation

Electromagnetic Induction

Laws of Motion

Work Energy Power

Alternating Current

Circular Motion

EM Waves

Ray Optics

Motion in One Dimension

Fluids

Elasticity

Wave Optics

X-Rays

1.

A scooter moves with a speed of 7 ms ^-1 , on a straight road and is stopped by applying the brakes. Before stopping, the scooter travels 10 m. If the weight of the scooter is W, then the total resistance to the motion of the scooter will be

2.

A cricketer of height 2.5 m throws a ball at an angle of 30° with the horizontal such that it is received by another cricketer of same height standing at a distance of 50 m from the first one. The maximum height attained by the ball is (tan 30° = 0.577)

3.

Water flows from a tap with steady flow, through a cross sectional area of 10 ^-3 m ² with a speed of 0.5 ms ^-1 . Assume the pressure is constant throughout the stream of water. The cross sectional area of the stream 0.19 m below the tap is

4.

Energy required for moving a body of mass m from a circular orbit of radius 3R to a higher orbit of radius 4R around the earth is.

5.

If A is the areal velocity of a planet of mass M, then its angular momentum is

6.

If the earth has a mass nine times and radius four times that of planet X, the ratio of the maximum speed required by a rocket to pull out of the gravitational force of planet X to that of the earth is

7.

To a fish under water, viewing obliquely, a fisherman standing on the bank of a lake looks

8.

In a container of height 21 cm, certain transparent liquid is taken to a height of 12 cm. When seen from above, it appears half filled. The refractive index of the liquid is

9.

When a particular wave length of light is used the focal length of a convex mirror is found to be 10 cm. If the wave length of the incident light is doubled keeping the area of the mirror constant, the focal length of the mirror will be:

10.

A ray of light travelling through a medium of refractive index 5/4 is incident on a glass of refractive index 3/2. Find the angle of refraction in the glass, if the angle of incidence at the given medium - glass interface is 30°.

11.

A slit of width 10 x 10 ^-7 m is illuminated by light of wavelength 500 nm. Angular position of the first minimum is

12.

When light wave passes from a medium of refractive index 'μ' to another medium of refractive index '2µ' the phase change occurs to the light is:

13.

A voltmeter of resistance 10000Ω.0.5 V/div is to be converted into a voltmeter to make it to read = 1 V/div. The value of high resistance to be connected in series with it is

14.

The resistance of the galvanometer and shunt of an ammeter are 90 ohm and 10 ohm respectively, then the fraction of the main current passing through the galvanometer and the shut respectively are:

15.

The magnetic permeability 'μ' a of a paramagnetic substance is: