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.
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become positively charged
become negatively charged
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Correct answer is A
The leaves collapse as the positive charges on the rod neutralize the negative charges on the electroscope.
Which of the following is a secondary colour
blue
orange
red
green
Correct answer is B
Primary colours are red, blue and green
∴ orange is a secondary colour
The ability of the human eye to focus object on the retina is referred to as the power of?
interference
diffraction
accomodation
superposition
Correct answer is C
Accommodation is the adjustment of the optics of the eye to keep an object in focus on the retina as its distance from the eye varies.
x is same as in y
x and y is same as in vacuum
x is higher than in y
y is higher than in x
Correct answer is D
Since 1.51, the refractive index of X is greater than 1.33, the refractive index of y, the speed of light in y is higher than that in X
If the refractive index of crown glass is 1.51, its critical angle is?
48.6°
22.5°
41.5°
45.5°
Correct answer is C
Sin c = (1)/n
= (1)/1.51 = 0.6622
∴ c = sin-\(^1\) 0.6622 = 41.47