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# Question Bank Solutions for ICSE Class 10 - CISCE - Physics

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A brass ball is hanging from a stiff cotton thread. Draw a neat labeled diagram showing the forces acting on the brass ball and cotton thread

[0.013000000000000001] Force
Chapter: [0.013000000000000001] Force
Concept: Force > Turning Forces Concept

Why is a jack screw provided with a long arm?

[0.011000000000000001] Work, Power and Energy
Chapter: [0.011000000000000001] Work, Power and Energy
Concept: Concept of Work, Energy, Power

Draw a ray diagram to show the refraction of a monochromatic ray through a prism when it suffers minimum deviation

[0.021] Refraction of Light Through Plane Surface
Chapter: [0.021] Refraction of Light Through Plane Surface
Concept: Refraction of Light > Refraction of Light Through a Glass Block and a Triangular Prism

The human ear can detect continuous sounds in the frequency range from 20 Hz to 20,000 Hz. Assuming that the speed of sound in air is 330 ms1 for all frequencies; calculate the wavelengths corresponding to the given extreme frequencies of the audible range

[0.03] Sound
Chapter: [0.03] Sound
Concept: Sound > Reflection of Sound Waves

How is the frequency of a stretched string related to its length?

[0.03] Sound
Chapter: [0.03] Sound
Concept: Sound > Reflection of Sound Waves

How is the frequency of a stretched string related it’s tension?

[0.03] Sound
Chapter: [0.03] Sound
Concept: Sound > Reflection of Sound Waves

When does the nucleus of an atom tend to be radioactive?

 Modern Physics
Chapter:  Modern Physics
Concept: Radioactivity and Changes in the Nucleus

Name the radiations which are absorbed by greenhouse gases in the earth’s atmosphere.

 Modern Physics
Chapter:  Modern Physics
Concept: Radioactivity and Changes in the Nucleus

A radiation X is focused by a particular device on the bulb of a thermometer and mercury in the thermometer shows a rapid increase. Name the radiation X

 Modern Physics
Chapter:  Modern Physics
Concept: Radioactivity and Changes in the Nucleus

A wire of length 80 cm has a frequency of 256 Hz. Calculate the length of a similar wire under similar tension, which will have frequency 1024 Hz

[0.03] Sound
Chapter: [0.03] Sound
Concept: Sound > Reflection of Sound Waves

A certain sound has a frequency of 256 hertz and a wavelength of 1.3 m.

1) Calculate the speed with which this sound travels

2) What difference would be felt by a listener between the above sound and another sound traveling at the same speed, but of wavelength 2.6 m?

[0.03] Sound
Chapter: [0.03] Sound
Concept: Sound > Reflection of Sound Waves

Answer the following questions based on a hot cathode ray tube

Name the charged particles

 Modern Physics
Chapter:  Modern Physics
Concept: Radioactivity and Changes in the Nucleus

Answer the following questions based on a hot cathode ray tube.

State the approximate voltage used to heat the filament

 Modern Physics
Chapter:  Modern Physics
Concept: Radioactivity and Changes in the Nucleus

Answer the following questions based on a hot cathode ray tube.

What will happen to the beam when it passes through the electric field?

 Modern Physics
Chapter:  Modern Physics
Concept: Radioactivity and Changes in the Nucleus

State three factors on which the rate of emission of electrons from a metal surface depends

 Modern Physics
Chapter:  Modern Physics
Concept: Radioactivity and Changes in the Nucleus

What are free electrons?

 Modern Physics
Chapter:  Modern Physics
Concept: Radioactivity and Changes in the Nucleus

Why do Free electrons not leave the metal surface on their own

 Modern Physics
Chapter:  Modern Physics
Concept: Radioactivity and Changes in the Nucleus

How can they be made to leave the metal surface? (State any two ways)

 Modern Physics
Chapter:  Modern Physics
Concept: Radioactivity and Changes in the Nucleus

How does the magnitude of this non-contact force on the two bodies depend on the distance of separation between them?

[0.013000000000000001] Force
Chapter: [0.013000000000000001] Force
Concept: Force > Turning Forces Concept

With reference to the terms Mechanical Advantage, Velocity Ratio and efficiency of a machine, name and define the term that will not change for the machine of a given design.

[0.012] Machines
Chapter: [0.012] Machines
Concept: Machines as Force Multipliers
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