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

Explain why the mechanical advantage of a class II of lever is always more than 1.

Draw a labelled diagram of a class II lever. Give one example of such a lever.

Explain why the mechanical advantage of the class III type of lever is always less than 1.

Class III levers have mechanical advantage less than one. Why are they then used?

Classify the following into levers:

A door

Classify the following into levers:

A catapult

Classify the following into levers:

Wheel barrow

Classify the following into levers:

A fishing rod

What is meant by sound ranging?

Give one use of sound ranging.

What is 'SONAR'?

State the use of echo in medical science/field.

Name and state the rule by which polarity at the ends of a current carrying solenoid is determined.

Show with the aid of a diagram how a wire is wound on a U-shaped piece of soft iron in order to make it an electromagnet. Complete the circuit diagram and label the poles of the electromagnet.

Name two factors on which the strength of magnetic field of an electromagnet depends and state how does it depend on the factors stated by you.

State three uses of an electromagnet?

State two differences between an electromagnet and a permanent magnet.

Name the material used for making the armature of an electric bell. Give a reason for your answer.

What is an electric motor?

principle of an electric motor ?