Basic Electrical Engineering MCQs Part 1
Contents
- 1 No current flows between two charged bodies when they have same
- 2 Electric current is due to the flow of
- 3 One coulomb of charge equals to the charge on
- 4 Temperature coefficient of resistance for semi-conductors is
- 5 The resistance of a straight conductor depends on all of below mentioned with the exception of
- 6 The diameter of an atom is about
- 7 The voltage drop across a 2 kW electric heater whose resistance when hot is 80 Ω
- 8 The mass of a proton is how many times the mass of electron
- 9 Which of following is an example of non-ohmic resistance
- 10 A substance having number of valence electrons more than 4 is usually
No current flows between two charged bodies when they have same
No current flows between two charged bodies when they have same
- Charge
- Capacity
- Potential
- None of the above
Correct answer: 3. Potential
Electric current is due to the flow of
Electric current is due to the flow of
- Positive charges only
- Negative charges only
- Both of above
- Neutral particles only
Correct answer: 3. Both of above
One coulomb of charge equals to the charge on
One coulomb of charge equals to the charge on
- 6.25 x 10^16 electrons
- 62.5 x 10^16 electrons
- 625 x 10^16 electrons
- 0.625 x 10^16 electrons
Correct answer: 3. 625 x 10^16 electrons
Temperature coefficient of resistance for semi-conductors is
Temperature coefficient of resistance for semi-conductors is:
- Zero
- Positive
- Negative
- None of the above
Correct answer: 3. Negative
The resistance of a straight conductor depends on all of below mentioned with the exception of
The resistance of a straight conductor depends on all of below mentioned with the exception of:
- Temperature
- Shape of cross-section
- Material
- Cross-sectional area
Correct answer: 2. Shape of cross-section
The diameter of an atom is about
The diameter of an atom is about:
- 10^-2 m
- 10^-5 m
- 10^-10 m
- 10^-20 m
Correct answer: 3. 10^-10 m
The voltage drop across a 2 kW electric heater whose resistance when hot is 80 Ω
The voltage drop across a 2 kW electric heater whose resistance when hot is 80 Ω
- 2 V
- 20 V
- 200 V
- 400 V
Correct answer: 4. 400 V
Solution: V = SQRT(P* R) = 400 V
The mass of a proton is how many times the mass of electron
The mass of a proton is how many times the mass of electron
- 1 time (is equal to)
- 3 times less than
- 400 times
- About 1837 times
Correct answer: 4. About 1837 times
Which of following is an example of non-ohmic resistance
Which of following is an example of non-ohmic resistance:
- Carbon resistance
- Copper wire
- Aluminum wire
- Tungsten wire
Correct answer: 1. Carbon resistance
A substance having number of valence electrons more than 4 is usually
A substance having number of valence electrons more than 4 is usually:
- An insulator
- A semiconductor
- A conductor
- None of the above
Correct answer: 1. An insulator