IGCSE Physics Paper1: Specimen Questions with Answers 49  51 of 109
Question number: 49
Question
Speedtime graph at constant speed for 2 objects is given. Which particle traveled higher distance in first 3 sec?
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
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
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,