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

How is mechanical advantage related to velocity ratio for a practical machine?

Give two reasons for a machine not to be 100% efficient?

What does the positive and negative sign of potential convey?

Find the potential difference required to flow a current of 300 mA in a wire of resistance 20 Ω.

State the couple's effect on a body.

If the power of a motor is 100 kW, at what speed can it raise a load of 50,000 N?

To which wire should the fuse be connected?

Explain the meaning of the student 'current rating of a fuse is 5A'.

A boy weighing 40 kgf climbs up a stair of 30 steps each 20 cm high in 4 minutes and a girl weighing 30 kgf does the same in 3 minutes. Compare:

1. The work done by them.
2. The power developed by them.

State the characteristics required in a material to be used as an effective fuse wire.

A stone of mass m is rotated in a circular path with a uniform speed by tying a strong string with the help of your hand. Answer the following questions

1) Is the stone moving with a uniform or variable speed?

2) Is the stone moving with a uniform acceleration? In which direction does the acceleration act?

3) What kind of force acts on the hand and state its direction?

When a body is placed on a table top, it exerts a force equal to its weight downwards on the table top but does not move or fall

1) Name the force exerted by the table top

2) What is the direction of the force?

Define equilibrium.

In a beam balance, when the beam is balanced in a horizontal position, it is in ______ equilibrium.

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

Give the expression for mechanical advantage of an inclined plane in terms of the length of an inclined plane.

For a fuse, higher the current rating ________ is the fuse wire.

Name the high energetic invisible electromagnetic waves which help in the study of the structure of crystals

State an additional use of the X-rays waves

Draw a simplified diagram of a lemon crusher, indicting of load and effort.