IGCSE Physics Paper-1: Specimen Questions with Answers 115 - 118 of 149
Question 115
Question
MCQ▾What is the momentum of a 10kg truck travelling at 5 m/s?
Choices
Choice (4) | |
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a. | 2 Kg m/s |
b. | 50 Kg km/hr |
c. | 10 Kg m/s |
d. | 50 Kg m/s |
Answer
d.Explanation
Momentum refers to the quantity of motion of an object.
Momentum (kg m/s)
Question 116
Question
MCQ▾How many Electrons are in a nucleus of Cl?
Choices
Choice (4) | |
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a. | 10 |
b. | 18 |
c. | 35 |
d. | 17 |
Answer
d.Explanation
A = Mass number = 35
Here, the Z= Atomic number = number of protons = number of electrons present in the atom = 17
Question 117
Question
MCQ▾Three rays of light fall on a concave lens as shown.
Which diagram shows the path of the rays passing through the lens?
Choices
Choice (4) | |
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a. | |
b. | |
c. | |
d. |
Answer
b.Explanation
- Concave lens is thicker at the edges than the centers.
The rays get diverge from the normal.
The image formed by the concave lens is diminished image.
It is smaller than the object and
The image is virtual image.
Question 118
Question
MCQ▾Mercury of u-tube is exposed to air at below the sea level. What is the height of the mercury?
Choices
Choice (4) | |
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a. | |
b. | |
c. | |
d. |
Answer
b.Explanation
- Pressure at the surface of the earth or at sea level is equal in all directing. And when we go higher or mountain regions the pressure level decreases.
At below sea level or lower down of the sea the pressure exerted at more pressure.
Pressure exert always from the atmosphere to the lower.