(English Medium) ICSE Class 10 - CISCE Question Bank Solutions for Physics

Calculate the kinetic energy of a body of mass 0.1 kg. and momentum 40kg m/s.

A body of mass 50 kg has a momentum of 3000 kg⁻¹ ms. Calculate:
(j) the kinetic energy of the body.
(ii) the velocity of the body.

A body of mass m falls from a height h₁ to a height h₂, above the ground (h₁ > h₂). What is the loss of potential energy?

Obtain an expression for the kinetic energy of a body of mass m moving with a velocity v?

A body of mass m is taken from a height h to 2h. What is the increase in its potential energy?

A ball of mass 50 g falls from a height of 2m and rebounds from the ground to 1.6 m. Find:
(i) The potential energy possessed by the ball when initially at rest.
(ii) The kinetic energy of the ball before it hits the ground.
(iii) The final potential energy of the ball.
(iv) The loss in kinetic energy of the ball on collision. (Take: g = 10N kg⁻¹)

In a hydroelectric power station, 1000 kg of water is allowed to drop through a height of 100 m in 1 sec. If the conversion of potential energy to electric energy is 60%. Calculate the power output. [Take: g = 10m/sec²]

How does a ray of light bend when it travels from rarer to denser medium

How does a ray of light bend when it travels from denser to rarer medium.

How does a ray of light bend when it travels from when it is normal to the interface of the two media.

Why do diamonds sparkle?

Can light be ‘piped’ like sound in a doctor’s stethoscope?

Write down the relationship between the critical angle and the refractive index of the medium.

Express the refractive index μ of a medium in terms of the angle of incidence i in air and the angle of refraction r in a denser medium.

If a ray of light passes from medium I to medium II without any change of direction, what can be said about the refractive indices of these media (angle I is not 0)?

How are critical angles related to the refractive index of the medium?

State two advantages of using a right-angle prism as a reflector, rather than a plane mirror.

State the S.I. unit of electrical resistance and define it.

Images formed by totally reflecting prisms are brighter than the image formed by ordinary reflected light, why?

How does the resistance of a metallic wire depend on the length of wire?