# Basic Electrical Engineering MCQs Part 19

Basic Electrical Engineering MCQs Part 19

## Temperature coefficient of resistance for insulators is

Temperature coefficient of resistance for insulators is:

1. Positive
2. Negative
3. Zero
4. None of these

## If electric current passes through nerve, the person

If electric current passes through nerve, the person:

1. Begins to weep
2. Begins to laugh
3. Is excited
4. 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:

1. Nickel
2. Steel
3. Tungsten
4. Aluminum

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:

1. 32 µS
2. 64 µS
3. 128 µS
4. None of these

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

1. Positive charges only
2. Negative charges only
3. Both of above
4. Neutral particles only

Correct answer: 3. Both of above