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.
Which of the following is NOT a vector quantity?
altitude
acceleration
displacement
weight
Correct answer is A
Altitude is just a measure of height, regardless of direction.
I and II only
I and III only
I, II and III only
I, II, III and IV only
Correct answer is D
∴i,ii, iii and iv have correct units.
Silicon doped with aluminum and germanium doped with arsenic become?
p- and n- types respectively
n- en p- type respectively
p- type semiconductor
n- type semiconductors
Correct answer is A
When silicon, a four valency element, is doped with aluminum, a three valency element, a p-type semiconductor is produced where the major carriers are the electrons.
Thus, the correct option is p-type and n-type respectively
The bond that forms a semiconductor is?
covalent
electrovalent
ionic
metallic
Correct answer is A
No explanation has been provided for this answer.
6.6 X 10-28
1.99 X 10-27
6.60 x 10-26
1.99 x 10-25
Correct answer is D
E = HF = (hc)/λ
Eλ = hc
∴ X = hc ==6.63 x 10-34 x 108
= 1.989 x 10-25
=1.99 x 10-25