CIE Physics Paper-1: Specimen Questions 50 - 52 of 109

Question number: 50

MCQ▾

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.

Choices

Choice (4) Response
a.

24V

b.

200V

c.

240V

d.

2400 V

Answer

a.

Explanation

Here Primary coil = 1200 turns

Secondary coil = 120 turns are given.

Now, output voltage can be calculated as,

Vo=Vi(NsNp)

Vo=240×[1201200]

V0=24V

Question number: 51

MCQ▾

Question

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

Choices

Choice (4) Response
a.

4

b.

6

c.

10

d.

3

Answer

a.

Explanation

Number of neutron can be find as,

Massnumber=numberofproton+numberofneutron

Nn=ZNp

Nn=73

Nn=4

Question number: 52

MCQ▾

Question

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

 Comparing the weights of three objects.

Comparing the weights of three objects.

In figure three positions of balance are shown in those comparisons of three objects are shown.

Choices

Choice (4) Response
a.

object 3

b.

object 1

c.

object 2

d. Question does not provide sufficient data or is vague

Answer

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.

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