IGCSE Physics Paper-1: Specimen Questions with Answers 40 - 43 of 109

Question number: 40

Edit
MCQ▾

Question

Hydro-electric power station converts which form of energy?

Choices

Choice (4) Response

a.

falling water

b.

oil

c.

hot rocks

d.

waves

Answer

a.

Explanation

The basic principle of hydro-electric is convert kinetic energy to electric energy. And here kinetic energy is obtained from falling water. Thus falling water is the source of energy converted by a hydro-electric power station.

Question number: 41

Edit
MCQ▾

Question

Which is a unit of density?

Choices

Choice (4) Response

a.

b.

c.

d.

Answer

c.

Explanation

Density is defined as mass per unit volume.

Now unit of mass is gram or kg

And unit of volume is cm3 or m3

Hence, unit of density is

Question number: 42

Edit
MCQ▾

Question

What metal should be used in magnetizing coil to make a temporary magnet from a piece of metal?

Magnetizing coil consist of metal road

Magnetizing Coil Consist of Metal Road

Figure shows a magnetizing coil wounded on a metal road and connected with battery

Choices

Choice (4) Response

a.

copper

b.

Aluminum

c.

steel

d.

soft iron

Answer

d.

Explanation

Only iron and steel shows the magnetic effect during electric current flow in the coil. But soft iron is used to make temporary magnet because it loses the magnetism after the electricity switched off.

Question number: 43

Edit
MCQ▾

Question

Find neutrons if atom of carbon has six protons and six electrons and nucleon number (mass number) of the atom is 12.

Choices

Choice (4) Response

a.

3

b.

6

c.

10

d.

4

Answer

b.

Explanation

Number of neutron can be find as,