# IGCSE Physics Paper-1: Specimen Questions with Answers 50 - 52 of 149

## Question number: 50

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### Question

Find output voltage if transformer has 240 V connected to its primary with a primary coil of 1200 turns and a secondary coil of 120 turns.

Choice (4)

a.

200V

b.

240V

c.

2400 V

d.

24V

d.

### Explanation

Here Primary coil = 1200 turns

Secondary coil = 120 turns are given.

Now, output voltage can be calculated as,

## Question number: 51

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### Question

Find neutrons if an atom of lithium contains three protons and three electrons and nucleon number (mass number) of the atom is 7.

Choice (4)

a.

3

b.

6

c.

10

d.

4

d.

### Explanation

Number of neutron can be find as,

## Question number: 52

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### Question

The weights of three objects are given. Which is heaviest?

### Choices

Choice (4)

a.

object 3

b.

object 1

c.

object 2

d.

Question does not provide sufficient data or is vague

a.

### Explanation

Here in above we shows that

In (a) diagram we shows that object 1 is heavier than object 2

In (b) diagram we shows that object 3 is heavier than object 2

So, we can say that objects 1 & 3 are heavier than the object 2

But from (c) diagram we can see that object 3 is heavier than the object 1. Therefore object 3 is heaviest than object 1 and 2.