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.
0.5cm
1.5cm
2.0cm
6.0cm
Correct answer is B
F = \(\frac{UV}{U + V}\)
20 = \(\frac{60 \times V}{60 + V}\)
V = 30cm
similarly, \(\frac{U}{V}\) = \(\frac{\text{height of object}}{\text{height of image}}\)
\(\frac{60}{30}\) = \(\frac{3}{h}\)
h = 1.5cm
If an object is placed in front of two mirrors inclined at 90o, how many images will be formed?
five
four
three
two
Correct answer is C
n = \(\frac{360}{\theta}\) - 1
= 360 - 1
= 3 images
f\(\alpha\)/
f\(\alpha \frac{1}{I^2}\)
f \(\alpha\sqrt I\)
f\(\alpha \frac{1}{1}\)
Correct answer is D
F = \(\frac{1}{2L}\sqrt\frac{T}{m}\)
Which of the following statements supports the assumption that light travels in straight lines?
light can be diffracted
a source of light produces distinct shadows of opaque objects
a source of light produces interference patterns on a suitably placed screen
light can be reflected
Correct answer is B
No explanation has been provided for this answer.
1
2
3
4
Correct answer is B
The fundamental frequency (Fo) = 40Hz
First overtone f1 = 2 \(\times\) 40 = 80
Second overtone f2 = 3 \(\times\) 40 = 120
Third overtone f3 = 4 \(\times\) 40 = 160.
Hence there are just two overtones between 40Hz and 150Hz