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

Name the colour code of the wire which is connected to switch for the appliance. 

A power circuit uses a cable having three different wires. Between which of the two wires should the heating element of an electric geyser be connected?

A power circuit uses a cable having three different wires. To which wire should the metallic case of the geyser be connected?

A power circuit uses a cable having three different wires. To which wire should the switch and fuse be connected?

The mass number and atomic number of an element are not changed when it emits ______.

Jatin puts a pencil into a glass container having water and is surprised to see the pencil in a different state.

1. What change is observed in the appearance of the pencil?
2. Name the phenomenon responsible for the change.
3. Draw a ray diagram showing how the eye sees the pencil.

Name the form of energy stored in a wound up spring of a watch.

Is centrifugal force a real force?

What is meant by resonance?

State the condition for the occurrence of resonance.

Give two characteristic of a high tension wire.

Which of the cables, one rated 5 A and the other 15 A will be of thicker wire? Give a reason for your answer.

Draw a labelled diagram of a D.C. motor showing its main parts.

What energy conversion does take place during the working of a d.c. motor?

State two ways by which the speed of rotation of an electric motor can be increased.

Name two appliances in which an electric motor is used.

In an electric motor the energy transformation is ______.

Draw a ray diagram to show the appearance of a stick partially immersed in water. Explain your answer. 

A fish is looking at a 1.0 m high plant at the edge of the pond. Will the plant appear shorter or taller than its actual height, to the fish. Draw a ray diagram to support your answer. 

The given figure shows a point source P inside a water container. Three rays A, B, and C starting from the source P are shown up to the water surface.

1. Show in the diagram the path of these rays after striking the water. The critical angle for water-air surface is 48°.
2. Name the phenomenon which the rays A, B, and C exhibit.