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

What is the use of the lever if its mechanical advantage is

1. more than 1,
2. equal to 1, and
3. less than 1?

Both a pair of scissors and a pair of pliers belong to the same class of levers. Name the class of lever. Which one has the mechanical advantage less than 1?

Explain why scissors for cutting cloth may have blades longer than the handles, but shears for cutting metals have short blades and long handles.

Which type of lever has a mechanical advantage always more than one? Give one example. What change can be made in this lever to increase its mechanical advantage?

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.

What is an 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.