# IGCSE Physics Paper-1: Specimen Questions with Answers 41 - 44 of 149

## Question 41

Edit

### Question

MCQ▾

Which is a unit of density?

Choice (4)
a.
b.
c.
d.

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 42

Edit

### Question

MCQ▾

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

Choice (4)
a.copper
b.Aluminum
c.steel
d.soft iron

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 43

Edit

### Question

MCQ▾

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

Choice (4)
a.3
b.6
c.10
d.4

b.

### Explanation

Number of neutron can be find as,

## Question 44

Edit

### Question

MCQ▾

Which one of the child has minimum weight?

### Choices

Choice (4)
a.Z
b.X
c.Y
d.All of the above

c.

### Explanation

Here from given figure one can conclude that

From first figure in weight Y > Z

From second figure Y > X

And from third figure Z > X

So, from all three results one can write

Therefore Y has maximum weight.