Magnetism — PHYSICS STD 6 — Question

Why is a 5 rupees coin attracted by a magnet? Name the metal present in the coin.

Work is said to be done if a man with a suitcase held in his hand climbs a staircase.

Mr Raman wants to use a permanent magnet to get the backyard of his factory cleared of junk. How can you convince Mr Raman to use an electromagnet instead of a permanent one ? What will happen if he does not follow your advice ?

State four uses of magnets/electromagnets.

Vehicles skid on muddy and wet roads. Suggest what type of tyres can prevent skidding of vehicles.

Convert the following quantity as indicated:
0.2 cm = mm

Suggest one way to recognize the magnetic field of the earth.

24 coins are placed one upon another and their total thickness is recorded by a half- metre scale. The thickness is found to be 4.8 cm . Find the thickness of each coin in millimetres.

What kin of beam of light is formed by : Search light or spot light

Draw diagram to illustrate the position of fulcrum, load, and effort, of the following:
a see-saw.