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

What purpose is served by the terminals of a three way pin plug? Draw a diagram and name the pins.

Draw a labelled diagram of a three pin socket.

The following diagram shows a three pin socket marked as 1, 2 and 3.

1. Identify and write live (L) neutral (N) and earth (E) against the correct number.
2. To which part of the appliance is the terminal 1 connected?
3. To which wire joined to 2 or 3, is the fuse connected?

In following Figure shows two bulbs with switches and fuse connected to mains through a three pin socket by means of a three wires cable. 

1. Label each component - bulb, switch, fuse and socket.
2. Name and state the colour of insulation of each wire 1, 2 and 3.
3. How are the two bulbs joined: in series or in parallel?

What is a superconductor?

A substance has zero resistance below 1 k. What is such a substance called?

Why is soft iron used as the core of the electromagnet in an electric bell?

The incomplete diagram of an electric bell is given in Figure. Draw winding of coil on the core and complete the electric circuit in the diagram.

G-Gong, H-Hammer, A-Armature, C-Core, B-Battery.

When an arrow is shot from a bow, it has kinetic energy in it. Explain briefly from where does it get its kinetic energy?

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

If the speed of a car is halved, how does its kinetic energy change?

Two bodies of equal masses are moving with uniform velocities v and 2v. Find the ratio of their kinetic energies.

A cannon ball of mass 500 g is fired with a speed of 15 m s^-1. Find:

1. its kinetic energy.
2. its momentum.

A bullet of mass 50 g is moving with a velocity of 500 m s⁻¹. It penetrated 10 cm into a still target and comes to rest. Calculate:

1. the kinetic energy possessed by the bullet, and
2. the average retarding force offered by the target.

A body of mass 10 kg is moving with a velocity 20 m s^-1. If the mass of the body is doubled and its velocity is halved, find:

1. the initial kinetic energy, and
2. the final kinetic energy.

A truck weighing 1000 kgf changes its speed from 36 km h^-1 to 72 km h^-1 in 2 minutes. Calculate:

1. the work done by the engine and
2. its power (g = 10 m s^-2)

A body of mass 60 kg has the momentum 3000 kg m s^-1. Calculate:

1. the kinetic energy.
2. the speed of the body.

How much work is needed to be done on a ball of mass 50 g to give it a momentum of 5 kg cm s^-1?

Show by a ray diagram that a diverging lens cannot form a real image of an object placed anywhere on its principal axis.

A body is thrown vertically upwards. Its velocity keeps on decreasing. What happens to its kinetic energy as its velocity becomes zero?