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

A 0.6 m long stretched wire is made to vibrate in two different modes as shown in figure

(a) 

(b)

(i) If the frequency of the note produced in (b) is n, what is the frequency in case (a)?
(ii) In which case (a) or (b), is the note louder? Give reasons.
(iii) In which case is the pitch higher? Give reason.

Two waves of the same pitch have their amplitudes in the ratio 2 : 3.
(i) What will be the ratio of their loudness?
(ii) What will be the ratio of their frequencies?

Name the principle of AC generator.

State the use of the principle of electromagnetic induction.

State two factors on which the magnitude of induced e.m.f. in a coil depend.

Explain how does the Lenz's law show the conservation of energy in the phenomenon of electromagnetic induction.

Explain the terms boiling.

State the conditions required for total internal reflection of light to take place.

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.

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.

Angle of deviation is the angle which the ______ ray makes with the direction of ______ray. 

What do you understand by the deviation produced by a prism? Why is it caused? 

How is the loudness of sound related to the intensity of the wave producing it?

Comment on the statement 'loudness of sound is a subjective quantity, while intensity is an objective quantity.

Name the unit used to measure the sound level.