ICSE ICSE Class 6 - CISCE Question Bank Solutions

Draw a ray diagram to show the formation of the shadow of an opaque object by a point source of light. How is the size of shadow affected if the screen is moved away from the object?

State two differences between an umbra and a penumbra.

Draw a ray diagram to show the formation of umbra alone.

Draw a ray diagram to show the formation of umbra and penumbra both. Label the parts umbra and penumbra in your diagram.

In the following diagram, draw rays to form umbra on the screen.

In the following diagram, draw rays to form a penumbra on the screen.

State the conditions when only the penumbra of an opaque object is obtained on the screen.

Why is it that the birds flying in the sky do not cast their shadow on the earth?

Write true or false of the following statement.

Artificial magnets are weaker than the natural magnets.

Write true or false of the following statement.

Permanent magnets get easily demagnetised.

Tick the correct answer.

Umbra is a region of

Fill in the blank.

Temporary magnets are usually made up of .................

Select the correct answer

Making a magnetic substance a magnet by bringing it closer to another magnet without touching it, is

Answer the following.

How is a shadow formed? Write the conditions required for a shadow to form.

Select the correct answer

The artificial magnet used to detect direction in the laboratory is

What are natural and artificial-magnets?

Describe the method by which an iron bar can be made a magnet.

State three differences between the temporary and permanent magnets.

Name the material of the core of an electromagnet for temporary magnet.

Tick the most appropriate answer.

Temporary magnets are made of