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

Why is a jack screw provided with a long arm?

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.

A scissor is a _________ multiplier

Name a common device where a gear train is used

Explain briefly why the work done by a fielder when he takes a catch in a cricket match is negative.

What is the principle of an ideal machine?

What is the work done by the moon when it revolves around the earth?

Why is the colour red used as a sign of danger?

An electron emitter must have _____________ work function and ___________ melting point.

Two forces each of 5N act vertically upwards and downwards respectively on the two ends of a uniform metre rule which is placed at its mid-point as shown in the diagram. Determine the magnitude of the resultant moment of these forces about the midpoint.

Draw a diagram to show how a single pulley can be used so as to have its ideal M.A= 2.

Derive a relationship between S.I. and C.C.S. unit of work

A force acts on a body and displaces it by a distance S in a direction at an angle θ with the direction of the force. What should be the value of θ to get the maximum positive work?

Define work.

Define the term energy.

State the S.I. unit of energy.

What are the two kinds of mechanical energy?

Give one example in the case where the force is of contact.

Give one example in the case where Force is at a distance.

A ball is hanging by a thread from the ceiling of the roof. Draw a neat labelled diagram showing the forces acting on the ball and the string