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

A bulb of power 60 W is used for 12.5 h each day for 30 days. Calculate the electrical energy consumed.

The diagram below shows a magnetic needle kept just below the conductor AB which is kept in North South direction.

1. In which direction will the needle deflect when the key _is closed?
2. Why is the deflection produced?
3. What will be the change in the deflection if the magnetic needle is taken just above the conductor AB?
4. Name one device which works on this principle.

Name two sources of background radiations.

Is it possible for us to keep ourselves away from background radiations?

Draw a diagram to show one such action of the total reflecting prism.

Give two similarities an AC generator and a DC motor

Two musical notes of the same pitch and same loudness are played on two different instruments. Their wave patterns are as shown in following Figure.

Explain why the wave patterns are different.

State the factor that determine the quality of the note.

Name the characteristic of the sound affected due to a change in its wave form.

In what respect does the wave pattern of a noise and a music differ? Draw diagram to explain your answer.

Two sounds of same loudness and same pitch produced by two different instruments differ in their ______.

State two dis-similarities between a d.c. motor and an a.c. generator.

Shows the wave patterns of three sounds A, B and C. Name the characteristic of sound which is same between

1. A and B,
2. B and C, and
3. C and A.

A	B	C

A change in amplitude of a sound wave is noticed.

1. Which characteristic of sound is affected due to the above change?
2. How is amplitude related to your answer to part (a) above?
3. What happens to the quality of the sound?

Two notes are produced from two different musical instruments, such that they have same loudness and same pitch. The produced notes differ in their ______.

A current of 0.2 A flows through a wire whose ends are at a potential difference of 20 V. Calculate the resistance of the wire.

A current of 0.2 A flows through a wire whose ends are at a potential difference of 20 V. Calculate the heat energy produced in 1 minute.

Which particles are responsible for current in conductors?

Which coil of a step up transformer is made thicker and why?

Name the transformer used in the power transmitting station of a power plant.