Basic Electrical Engineering MCQs Part 19
Contents
Temperature coefficient of resistance for insulators is
Temperature coefficient of resistance for insulators is:
- Positive
- Negative
- Zero
- None of these
Correct answer: 2. Negative
If electric current passes through nerve, the person
If electric current passes through nerve, the person:
- Begins to weep
- Begins to laugh
- Is excited
- Becomes insensitive to feel pain
Correct answer: 1. Begins to weep
The filament of incandescent electric bulb is made of
The filament of incandescent electric bulb is made of:
- Nickel
- Steel
- Tungsten
- Aluminum
Correct answer: 3. Tungsten
Explanation: The filament is the part of the electric light bulb that produces light. Filaments in incandescent light bulbs are made of tungsten. When an electric current goes through the filament, the filament glows.
The maximum possible conductance of a 80 kΩ, 20% resistor is
The maximum possible conductance of a 80 kΩ, 20% resistor is:
- 32 µS
- 64 µS
- 128 µS
- None of these
Correct answer: 2. 64 µS
Solution:
Conductance G is inversely proportional to Resistance R. G = 1/R
Conductance will be maximum when resistance is minimum
Minimum value of R = 80 – (80 * 20/100) = 64 µS
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