IGCSE Physics Paper-1: Specimen Questions with Answers 74 - 76 of 149
Question 74
Question
MCQ▾Find movement of air particle as sound wave passes.
Choices
Choice (4) | |
---|---|
a. | moves to the right and stays there () |
b. | moves up and stays there () |
c. | moves up and down () |
d. | moves left and right () |
Answer
d.Explanation
Sound wave is move in the air towards right and due to effect of sound waves particle of air also moves to the right and because of reflection of it, it moves in opposite direction. So, one can say that particle of air move left and right.
Question 75
Question
MCQ▾How heat moves through water in a heater used to heat a tank of cold water?
Choices
Choice (4) | |
---|---|
a. | conduction |
b. | evaporation |
c. | radiation |
d. | convection |
Answer
a.Explanation
In heater used to heat a tank of cold water, as switch is start, rod is going to heat. Because of electric energy is converted in to heat energy. And water molecules near heater absorb heat and pass to other molecules of water. Thus from road to water conduction process is occur.
Question 76
Question
MCQ▾Find order of weight of 3 children on the see saw.
Choices
Choice (4) | |
---|---|
a. | |
b. | |
c. | |
d. |
Answer
d.Explanation
Here from given figure one can conclude that
From first figure in weight Y > X
From second figure Y > Z
And from third figure X > Z
So from all three results one can write