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

Define the term heat.

Define the term calorie. How is it related to joule (the S.I. unit of heat)?

Define one kilo-calorie of heat.

A bullet of mass 0.5 kg slows down from a speed of 5 m s-1 to that of 3 m s-1. Calculate the change in kinetic energy of the ball.

How much energy is gained by a box of mass 20 kg when a man, carrying the box waits for 5 minutes for a bus?

State two advantage of producing hydroelectricity.

State two disadvantages of producing hydroelectricity.

State the energy transformation on the following:

Electricity is obtained from solar energy.

State the law of conservation of energy.

What do you mean by degradation of energy?

Explain degradation of energy by taking two examples of your daily life.

The diagram below shows a claw hammer used to remove a nail : 

(i) To which class of lever does it belong ?
(ii) Give one more example of the same class of lever mentioned by you in (i) for which the mechanical advantage is greater than one.

Its moment of a force scalar or a vector quantity?

Name the physical quantity whose SI unit is Nm.

What is meant by a translational motion? Give one example.

What is the relationship between Nm and dyne cm?

Why does a spanner have a long handle?

Draw a neat labeled diagram to show the direction of two forces acting on a body to produce rotation in it. Also mark the point about which rotation takes place.

Give two examples of couple action in our daily life.

P, Q and R are three forces which act as shown in fig.

The point O lies in the same plane. Given, P = Q = R = 10N

(i) Which force has the least moment about O? Give a reason.

(ii)Which force has the greatest moment about O? Give a reason.