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

A radioactive substance is oxidized. Will there be any change in the nature its radioactivity? Give a reason for your answer

From the diagram given below. answer the question that follows:

1. What kind of pulleys are A and B?
2. State the purpose of pulley B.
3. What effort has to be applied at C just raise the load L = 20 kgf?
   (Neglect the weight of pulley A and friction)

A pulley system has three pulleys. A load of 120 N is overcome by applying an effort of 50 N. Calculate the Mechanical Advantage and Efficiency of this system.

Write a relationship between the angle of incidence and angle of refractions for a given pair of media.

What do you understand by the term Scattering of light?

Give one reason for Ultrasonic waves use for echo depth sounding purpose.

Why are the Ultrasonic waves are not audible to us?

Arrange α, β, and γ rays in ascending order with respect to their

1) Penetrating power.

2) Ionising power

3) Biological effect

In a cathode ray tube, what is the function of anode?

State the energy conversion taking place in a cathode ray tube

Write one use of cathode ray tube.

Represent the change in the nucleus of a radioactive element when a β particle is emitted.

Under which conditions does the nucleus of an atom tend to radioactive?

Name one factor that affects the lateral displacement of light as it passes through a rectangular glass slab.

The speed of light in glass is 2 × 10⁵ km/s. What is the refractive index of glass?

Draw a graph between displacement and the time for a body executing free/natural vibrations.

Why is a cathode ray tube evacuated to a low pressure?

What happens if the negative potential is changed on a grid?

A block and tackle system has V.R. = 5.

Draw a neat labeled diagram of a system indicating the direction of its load and effort.

A block and tackle system has V.R. = 5.

Rohan exerts a pull of 150 kgf. What is the maximum load he can raise with this pulley system if its efficiency = 75%?