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

How can one distinguish the sounds of two musical instruments even if they are of the same pitch and same loudness?

How do you account for the fact that two strings can be used to give notes of the same pitch and loudness but of different quality?

The same musical note when played on a piano and when played on a flute sounds different.

Name one main factor on which each character such as intensity, pitch, and quality of musical sound depends.

When a gun is fired at a distance, why is it that the flash is seen almost instantaneously while the sound is heard a little later?

Which characteristics of sound will change if there is a change in its amplitude and its waveform.

How is it possible to detect the filling of a pitcher under a tap by hearing its sound at a distance?

Three musical instruments give out notes at the frequencies listed below. Flute: 400 Hz; Guitar: 200 Hz; Trumpet: 500 Hz. Which one of these has the highest pitch?

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.