Physics Questions and Answers
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
The symbol illustrated above is that of a resistor?
which absorb light
which emits light
which absorbs heat to function properly
whose resistance is light dependent
Correct answer is D
A photoresistor or light dependent resistor is an electronic component that is sensitive to light. When light falls upon it, then the resistance changes.
Used where there is a need to sense the presence and absence of light is necessary. These resistors are used as light sensors and the applications of LDR mainly include alarm clocks, street lights, light intensity meters, burglar alarm circuits.
i only
ii only
i and ii only
i, ii and iii
Correct answer is C
No explanation has been provided for this answer.
the same charge flows through them
the same voltage appears across each capacitor
different quantities of charges flow through them in different voltages across them
different quantities of charges flows through them with the same voltage across them
Correct answer is A
No explanation has been provided for this answer.
120 w
360 w
720 w
2400 w
Correct answer is C
Power - IV
I = \(\frac{P}{V}\)
= \(\frac{12000}{2000}\)
I = 6A
Power loss = I\(^2\)R = 6\(^2\) x 20
= 720 W
4.6v
6.0v
8.5v
12.0v
Correct answer is C
Vo = V\(\_{rms}\) x \(\sqrt{2}\)
Vo = 6 x 1.414
Vo = 8.484
= 8.5v