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

The following diagram shows a 60°, 30°, 90° glass prism of critical angle 42°, Copy the diagram and complete the path of incident ray AB emerging out of the prism marking the angle of incidence on each surface.

What do you understand by free vibrations of a body?

State any two advantages of electromagnets over permanent magnets.

The pulley system has drawn lifts a load of 150 N when an effort of 60 N is applied. Find its mechanical advantage.

Is the above pulley system an ideal machine or not?

State two differences between "Heat Capacity" and "Specific Heat Capacity".

What are isobars?

Give one example of isobars.

Radiations given out from a source when subjected to an electric field in a direction perpendicular to their path are shown below in the diagram. The arrows show the path of the radiation A, B and C. Answer the following questions in terms of A, B and C.

1) Name the radiation B which is unaffected by the electrostatic field.

2) Why does the radiation C deflect more than A?

3) Which among the three causes the least biological damage externally.

4) Name the radiation which is used in carbon dating.

Differentiate between a single fixed pulley and a single movable pulley.

Draw diagrams to show the refraction of light from 

1. air to glass, and
2. glass to air. In each diagram, label the incident ray, refracted ray, the angle of incidence
3. and the angle of refraction (r).

Draw diagrams to show the refraction of light from glass to air. In  diagram, label the incident ray, refracted ray, the angle of incidence (i) and the angle of refraction (r).

Name a machine to change the direction of force ?

How is the refractive index of a medium related to the speed of light in it? 

A monochromatic ray of light passes from air to glass. The wavelength of light in air is λ, the speed of light in air is c and in glass is V. If the absolute refractive index of glass is 1.5, write down

1. the relationship between c and V,
2. the wavelength of light in glass.

For which colour of white light, is the refractive index of a transparent medium the most?

Name the physical quantity which is measured in calorie. How is it related to the S.I. unit of the quality?

Differentiate between watt and watt hour.

A ray of light strikes the surface of a rectangular glass block such that the angle of incidence in
air is  0°.
In each case, draw diagram to show the path taken by the ray as it passes through the glass block and emerges from it. 

In the adjacent diagram, AO is a ray of light incident on a rectangular glass slab.

1. Complete the path of the ray till it emerges out of the slab.
2. In the diagram, mark the angle of incidence (i) and the angle of refraction (r) at the first interface. How is the refractive index of glass related to the angles i and r?
3. Mark angles of emergence by the letter e. How are the angles i and e related?
4. Which two rays are parallel to each other? Name them.
5. Indicate in the diagram the lateral displacement between the emergent ray and the incident ray. State one factor that affects the lateral displacement.