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

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.

Two resistors having resistance 8 Ω and 12 Ω are connected in parallel. Find their equivalent resistance.

Four resistors each of resistance 5 Ω are connected in parallel. What is the effective resistance?

You have three resistors of values 2 Ω, 3 Ω, and 5 Ω. How will you join them so that the total resistance is less than 1 Ω? Draw a diagram and find the total resistance.

Two resistors of resistances 2 Ω and 3 Ω are connected in parallel to a cell to draw current 0.5 A from the cell. Draw a labelled diagram of the arrangement

Two resistors of resistance 2 Ω and 3 Ω are connected in parallel to a cell to draw current 0.5 A from the cell. Calculate the current in each resistor.

A particular resistance wire has a resistance of 3·0 ohm per metre. Find the resistance of 5 m length of a wire of the same material, but with twice the area of cross section.

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.