IGCSE Physics Paper-1: Specimen Questions with Answers 49 - 51 of 109

Question number: 49

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Question

Speed-time graph at constant speed for 2 objects is given. Which particle traveled higher distance in first 3 sec?

 Two graphs of speed ⟶ time

Two Graphs of Speed ⟶ Time

in above figure we shows that graph of speed vs time

Choices

Choice (4) Response

a.

object1

b.

object 2

c.

same speed

d.

All of the above

Answer

a.

Explanation

For Object 1:

Here in given figure we show that an object 1 moving at constant speed 2 m/s.

Here we want to find the distance traveled by the object in first 3 sec. Therefore from formula of speed,

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.

Choices

Choice (4) Response

a.

200V

b.

240V

c.

2400 V

d.

24V

Answer

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.

Choices

Choice (4) Response

a.

3

b.

6

c.

10

d.

4

Answer

d.

Explanation

Number of neutron can be find as,