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

When a white light ray falls on a prism, the ray at its first surface suffers ______.

In the spectrum of white light by a prism, the colour at the extreme end opposite to the base of prism is ______.

The frequency range of visible light is from 3.75 × 10¹⁴ Hz to 7.5 × 10¹⁴ Hz. Calculate its wavelength range. Take speed of light = 3 × 10⁸ m/s.

Define amplitude term in relation to a wave.

Define frequency term in relation to a wave.

Define wavelength term in relation to a wave.

Define wave velocity term in relation to a wave.

A wave passes from one medium to another medium. Mention one property of the wave out of speed, frequency or wavelength which changes.

A wave passes from one medium to another medium. Mention one property of the wave out of speed, frequency or wavelength which does not change.

State two factors on which the speed of a wave travelling in a medium depends.

State two differences between the light and sound waves.

What is the condition necessary for an echo to be heard distinctly?

State the use of echo by a bat, dolphin and fisherman.

How do bats avoid obstacles in their way, when in flight?

Name the waves which are used in sonar to find the depth of a sea. Give one reason for their use.

State the S.I. unit of electric potential.

How is the electric potential difference between the two points defined? State its S.I. unit.

Explain the statement ‘the potential difference between two points is 1 volt’.

Explain the analogy between the flow of charge (or current) in a conductor under a potential difference with the free fall of a body under gravity. 

How does the resistance of a metallic wire depend on its temperature? Explain with reason.