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

What is the noise? Give an example.

What is meant by the ‘pitch’ of a note? Does it depend on the loudness or ‘quality’ of the ‘note’? How is pitch ‘related’ with frequency?

What is meant by the ‘loudness’ of a sound? How is it related to the intensity?

Draw a diagram to show the waveforms of a pure note and a musical note, of the same pitch and same loudness.

Two musical notes of the same pitch and loudness are played on a violin and a piano. Their waveforms are as shown in the figure below:

The frequency of the stretched string of a fixed length is f when it is plucked in the middle. Where should it be plucked so that string vibrates with frequency (i) 2f, (ii) 3f?
Draw diagrams to show these vibrations and name them.

The diagram below shows three ways in which the string of an instrument can vibrate.

(i) Which of the above diagrams shows the fundamental note?
(ii) Which has the frequency 4 times that of the fundamental?
(iii) State the ratio between the frequency of the first and second.

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.