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.
co-ordinate bonds
electrovalent bonds
a substance free of bonds
covalent bonds
Correct answer is D
It's generally created using silicon, germanium, or other pure elements.
Semiconductors are created by adding impurities to the element.
The conductance or inductance of the element depends on the type and intensity of the added impurities.
The electrons surrounding each atom in a semiconductor are part of a covalent bond
The main factor which affects the speed of sound wave is the?
properties of the medium
amplitude of the sound wave
intensity of the sound wave
loudness of the sound wave
Correct answer is A
Factors Affecting The Speed of Sound
2.5 KW
80 KW
25 KW
50 KW
Correct answer is D
where force = f, mass = m, acceleration = a, velocity = v, time = t
Force = m * a → m * \(\frac{Δv}{t}\)
Power = f * v
P = m * \(\frac{v}{t}\) * v = m * \(\frac{v^2}{t}\)
p = \(\frac{1600 * 25^2}{20}\)
p = 50,000 or 50 KW
7.06 x 10\(^{3}\)J
5.38 x 10\(^{3}\)J
6.72 x 10\(^{3}\)J
1.35 x 10\(^{3}\)J
Correct answer is C
quantity of heat = mass * Specific latent heat → 20 * 336
quantity of heat = 6720j or 6.72 x 10\(^{3}\)J
The graph of pressure (P) against the reciprocal of the volume (I/V) in Boyles's law is a?
hyperbola
parabola
curve
straight line
Correct answer is D
The graph of pressure (P) against the reciprocal of the volume (I/V) is a straight line passing through the origin.