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

For earthing an electrical appliance, one has to remove the paint from the metallic body of the appliance where the electrical contact is made. Explain the reason.

Why is it necessary to have an earth wire installed in a power circuit, but not in a lighting circuit?

A movable pulley is used as ______.

Name the material used for making the connection wires. Give a reason for your answer.

Name a material which is used for making the standard resistor. Give a reason for your answer.

Name the material used for making a fuse wire. Give a reason.

Name the material used for filament of an electric bulb.

Name the material used for heating element of a room heater.

Define the term potential energy of a body.

The potential energy of a body is the energy by virtue of its ______.

A body at a height possesses ______.

A converging lens forms the image of an object placed in front of it beyond 2F₂ of the lens. Where is the object placed?

A converging lens forms the image of an object placed in front of it, beyond 2F₂ of the lens. State three characteristics of the image.

A spring is kept compressed by a small trolley of mass 0.5 kg lying on a smooth horizontal surface as shown in the adjacent fig. When the trolley is released, it is found to move at a speed v = 2 m s^-1. What potential energy did the spring possess when compressed?

Draw a ray diagram to show how a converging lens can form a real and enlarged image of an object.

Draw a ray diagram to show how a converging lens can form an image of the sun. Hence give a reason for the term ‘burning glass’ for a converging lens used in this manner.

A lens forms an inverted image of an object. What is the nature of the image real or virtual?

An object is placed at a distance of more than 40 cm from a convex lens of focal length 20 cm. The image formed is real, inverted and ______.

An object is placed at a distance 2f from a convex lens of focal length f. The size of the image formed is ______ that of the object.

An object is placed at a distance 5 cm from a convex lens of focal length 10 cm. The image formed is virtual, upright and _____.