(English Medium) ICSE Class 10 - CISCE Important Questions for Physics

A non uniform beam of weight 120 N pivoted at one end is shown in the diagram below. Calculate the value of F to keep the beam in equilibrium.

A hollow ice cream cone has height 6 cm.

1. Where is the position of its center of gravity from the broad base?
2. Will its position change when it is filled completely with honey? Write Yes or No.

Why is a jack screw provided with a long arm?

How is work done by a force measured when the force is in an angle to the direction of displacement?

Rajan exerts a force of 150 N in pulling a cart at a constant speed of 10 m/s^-1. Calculate the power exerted.

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

Calculate the change in the Kinetic energy of a moving body if its velocity is reduced to 1/3rd of the initial velocity.

State the energy change in the following device while in use:
A loudspeaker

State the energy change in the following device while in use:

A glowing electric bulb.

What is nuclear energy?

Name the process used for producing electricity using nuclear energy.

State one important advantage and disadvantage each of using nuclear energy for producing electricity.

(i) The conversion of part of the energy into an undesirable form is called ______________.
(ii) For a given height h, __________________ the length l of the inclined plane, lesser will be the effort required.

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

State the energy changes in the following case while in use:

An electric iron

State the energy changes in the following case while in use:

A ceiling fan

Name the unit of physical quantity obtained by the formula `(2K)/v^2` Where K: kinetic energy, v: linear velocity

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