Muscular force is a contact force.

Important Questions on Force and Machine

EASY

Science>Physics>Force and Machine>Types of Force

Calculate the number of electrons constituting one coulomb of charge.

MEDIUM

Science>Physics>Force and Machine>Types of Force

A body has a negative charge of $1 \mathrm{\mu c}$. It means the body has gained:

EASY

Science>Physics>Force and Machine>Types of Force

Write two uses of magnets.

MEDIUM

Science>Physics>Force and Machine>Types of Force

How will you prepare your own magnetic compass?

EASY

Science>Physics>Force and Machine>Types of Force

A magnetic compass is a device which is widely used by the sailors.

MEDIUM

Science>Physics>Force and Machine>Types of Force

Magnets are used in maglev trains. Explain.

EASY

Science>Physics>Force and Machine>Types of Force

Before the invention of a compass, sailors used stars to find direction. In what way is using compass better?

EASY

Science>Physics>Force and Machine>Types of Force

What is a magnetic compass? 

MEDIUM

Science>Physics>Force and Machine>Types of Force

A current of $1.6 \mathrm{mA}$ flows through a conductor. If charge on an electron is $-1.6\times {10}^{-19}$ coulomb, find the number of electrons that will pass each second through the cross section of that conductor.

EASY

Science>Physics>Force and Machine>Types of Force

Magnets should not be placed near a:

EASY

Science>Physics>Force and Machine>Types of Force

A freely suspended bar magnet comes to rest in the

MEDIUM

Science>Physics>Force and Machine>Types of Force

Magnetite is a type of mineral that can attract iron.

EASY

Science>Physics>Force and Machine>Types of Force

_____ is the force exerted by a magnet on magnetic substances.

EASY

Science>Physics>Force and Machine>Types of Force

List two properties of a magnet.

EASY

Science>Physics>Force and Machine>Types of Force

List the various shapes of magnets that you can find.

EASY

Science>Physics>Force and Machine>Types of Force

Why does a freely suspended magnet point in the north-south direction?

MEDIUM

Science>Physics>Force and Machine>Types of Force

Find out and explain the usefulness of a compass in finding directions.

EASY

Science>Physics>Force and Machine>Types of Force

Explain the term:

Compass

EASY

Science>Physics>Force and Machine>Types of Force

Cotyledons are also called-

EASY

Science>Physics>Force and Machine>Types of Force

Why does the door of refrigerator left slightly open, shut automatically?