IGCSE Physics Paper-1: Specimen Questions with Answers 112 - 114 of 149
Question number: 112
Question
Which particles do not experience an electromagnetic force?
Choices
| Choice (4) | Response | |
|---|---|---|
a. | gamma rays | |
b. | particles | |
c. | Electrons | |
d. | protons | |
Answer
d.Explanation
Charged particles interact by emitting and absorbing photons.
Photons do not experience an electromagnetic force,
And they do not interact with each other.
The electromagnetism is produced by the energy and momentum they carry.
Question number: 113
Question
A ruler is used to measure length of pen.
Image of Length of Pen
What would be the length of the pen?
Choices
| Choice (4) | Response | |
|---|---|---|
a. | 47 cm | |
b. | 41 cm | |
c. | 39 cm | |
d. | 50 cm | |
Answer
a.Explanation
Length of Pen Answer
The length of the pen would be 47cm.
The tip of the pen is at 6cm on scale and end of the pen at 53cm.
The required length is .
Question number: 114
Question
Which of the following symbol is for the Light Dependent Resister?
Choices
| Choice (4) | Response | |
|---|---|---|
a. |  Light Dependent Resister? Part -2 | |
b. |  Light Dependent Resister? Part -3 | |
c. |  Light Dependent Resister? Part -4 | |
d. |  Light Dependent Resister? Part -1 | |
Answer
c.Explanation
In the dark conditions the Light dependent resistor LDR has a high resistance.
In the light the resistance of the LDR is very low.
The symbol of the Light Dependent Resistor is
Light Dependent Resister?