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

A ray of light travels from water to air as shown in the diagram given below :

1) Copy the diagram and complete the path of the way. Given the critical angle for water is 48°.

2) State the condition so that internal reflection occurs in the above diagram.

The diagram below shows a point source P inside a water container. Four rays A, B, C, D starting from the source P, are shown up to the water surface.

1. Show in the diagram the path of these rays after striking the water surface. The Critical Angle for the water-air surface is 48°.
2. Name the phenomenon which the rays B and D exhibit.

Calculate the change in the Kinetic energy of a moving body if its velocity is reduced to 1/3rd of the initial velocity.

State the energy change in the following device while in use:
A loudspeaker

State the energy change in the following device while in use:

A glowing electric bulb.

What is nuclear energy?

Name the process used for producing electricity using nuclear energy.

State one important advantage and disadvantage each of using nuclear energy for producing electricity.

(i) The conversion of part of the energy into an undesirable form is called ______________.
(ii) For a given height h, __________________ the length l of the inclined plane, lesser will be the effort required.

Name the factors affecting the critical angle for the pair of media.

State the relation between the critical angle and the absolute refractive index of a medium.

Which colour of light has a higher critical angle? Red light or green light.

Draw the diagram of a right-angled isosceles prism which is used to make an invented image erect.

How does the wave pattern of a loud note differ from that of a soft note? Draw a diagram.

Name the force required for circular motion. State its direction.

What is a centripetal force?

With reference to the direction of action, how does a centripetal force differ from centrifugal force?

Is centrifugal force the force of rection of centripetal force?

A body of mass m falls down through a height h. Obtain an expression for the work done by the force of gravity.

A boy of mass m climbs up a staircase of vertical height h.
(a) What is the work done by the boy against the force of gravity?
(b) What would have been the work done if he uses a lift in climbing the same vertical height?