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

Name the type of single pulley that has an ideal mechanical advantage equal to 2. Draw a labelled diagram of the pulley mentioned by you.

Which colour of white light travels fastest in any medium except air?

A ray of light strikes the surface of a rectangular glass slab such that the angle of incidence in air is

1. 0°,
2. 45°.

In each case, draw a diagram to show the path taken by the ray as it passes through the glass slab and emerges from it.

Where can a body execute natural vibrations?

Why is the switch put in the live wire?

What precaution do you take while handling a switch?

Name the wire to which a switch is connected.

Define kilowatt hour.

What is lateral displacement?

Why does sun appear red at sunrise and sunset?

Give one example of damped vibrations

Draw the diagram of a dual control switch when the appliance is switched ‘ON’.

Which color of white light is scattered the least and why?

Why does the amplitude of a vibrating body continuously decrease during damped vibrations?

Describe a simple experiment to verify the principle of moments, if you are supplied with a metre rule, a fulcrum and two springs with slotted weights.

A uniform metre rule is pivoted at its mid-point. A weight of 50 gf is suspended at one end of it. Where should a weight of 100 gf be suspended to keep the rule horizontal?

The diagram below shows a uniform bar supported at the middle point O. A weight of 40 gf is placed at a distance of 40 cm to the left of the point O. How can you balance the bar with a weight of 80 gf?

When a boy weighing 20 kgf sits at one end of a 4 m long see-saw, it gets depressed at this end. How can it be brought to the horizontal position by a man weighing 40 kgf.

A physical balance has its arms of length 60 cm and 40 cm. What weight kept on pan of the longer arm will balance an object of weight 100 gf kept on other pan?

A uniform metre rule of mass 100 g is balanced on the fulcrum at mark 40 cm by suspending an unknown mass m at the mark 20 cm.

1. Find the value of m.
2. To which side the rule will tilt if the mass m is moved to the mark 10 cm?
3. What is the resultant moment now?
4. How can it be balanced by another mass of 50 g?