Basic Concepts of Electrical Engineering MCQ Questions Answers
Electrical engineering is a dynamic and ever-evolving field that plays a crucial role in powering our modern world. From generating and distributing electricity to designing intricate electronic devices, electrical engineers are at the forefront of innovation. To gauge your understanding of the fundamental concepts in electrical engineering, we have compiled a set of multiple-choice questions (MCQs) along with their answers.
1) The diameter of an atom is about
a) 10-10m
b) 10-8m
c) 10-2m
d) 10-15m
2) The electric current is due to the flow of
a) positive charges only
b) negative charges only
c) both positive and negative charges
d) neutral particles only
3) The number of compounds available in nature is
a) 105
b) 300
c) 1000
d) unlimited
4) No current flows between two charged bodies if they have same
a) capacity
b) potential
c) charge
d) none of the above
5) The thermal speed of electronics is of the order of
a) 1 ms-1
b) 10-3 ms-1
c) 106 ms-1
d) 3 x 108 ms-1
6) The SI unit of conductivity is
a) ohm-m
b) ohm/m
c) mho-m
d) mho/m
7) Which one of the following is the best conductor of electricity?
a) silver
b) gold
c) copper
d) zinc
8) Potential difference has the unit of
a) charge
b) power
c) energy
d) none of the above
9) Which of the following is the best material for making connecting wires?
a) manganin
b)constantan
c) copper
d) bichrome
10) If a wire is melted and recast to half of its length, then the new rasistance is
a) R/4
b) R/2
c) R
d) 2 R