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

What is the weight of a body placed at the centre of the earth?

A lens forms an erect, magnified, and virtual image of an object. Draw a labelled ray diagram to show the image formation. 

An electric iron is rated 220V, 2kW.

1) if the iron is used for 2h daily find the cost of running it for one week if it costs 4.25 per kWh

2) Why is the fuse absolutely necessary in a power circuit?

State a factor on which the position of the centre of gravity of a body depend? Explain your answer with an example.

What is the position of the centre of gravity of a rectangular lamina?

What is the position of the centre of gravity of a cylinder?

At which point is the centre of gravity situated in a triangular lamina?

At which point is the centre of gravity situated in a circular lamina?

Where is the centre of gravity of a uniform ring situated?

A square cardboard is suspended by passing a pin through a narrow hole at its one corner. Draw a diagram to show its rest position. In the diagram, mark the point of suspension by the letter S and the centre of gravity by the letter G.

Explain how you will determine experimentally the position of the centre of gravity for a triangular lamina (or a triangular piece of cardboard).

'The position of the centre of gravity of a body remains unchanged even when the body is deformed'.

'The centre of gravity of a freely suspended body always lies vertically below the point of suspension'.

A uniform flat circular rim is balanced on a sharp vertical nail by supporting it at point A, as shown in the figure. Mark the position of the centre of gravity of the rim in the diagram by the letter G.

The figure shows three pieces of cardboard of uniform thickness cut into three different shapes. On each diagram draw two lines to indicate the position of the centre of gravity G.

The centre of gravity of a uniform ball is ______.

1. Name the particles which are responsible for the flow of current in a metallic wire.
2. Explain the flow of current in a metallic wire on the basis of movement of the particles named by you above in part (a).
3. What is the cause of resistance offered by the metallic wire in the flow of current through it?

Two wires, one of copper and other of iron, are of the same length and same radius. Which will have more resistance? Give reason. 

What is the velocity ratio of a single movable pulley? How does the friction in the pulley bearing affect it?

In a single movable pulley, if the effort moves by a distance x upwards, by what height is the load raised?