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.
300N
600N
800N
800N
Correct answer is D
No explanation has been provided for this answer.
27\(^o\)
33.5\(^o\)
51.7\(^o\)
72.8\(^o\)
Correct answer is B
The angle of incidence l = 30º
The angle of refraction , r =?
The refractive index of glass ng = 1.5
The refractive index of ethyl alcohol, ne = 1.36
from snell's law :
\(\frac{n_e}{n_g} = \frac{sini}{sinr}\)
\(\frac{1.36}{1.5} = \frac{sin30º}{sinr}\)
1.36sinr = 1.5 x sin30º
sinr = \(\frac{1.5 \times sin30º}{1.36}\)
sinr = 0.5515
r = \(sin^{-1}\)(0.5515)
r = 33.5º
A
B
C
D
Correct answer is C
No explanation has been provided for this answer.
The earpiece of a telephone handset converts energy from
electrical to sound
sound to electrical
sound to electrical
sound to radio wave
Correct answer is A
No explanation has been provided for this answer.
step-up transformer
step-down transformer
d.c generator
a.c generator
Correct answer is B
In a step down transformer, there are more turns in the primary coil than in the secondary coil and more current flows in the secondary circuit than in the primary.