ECE 331 EXAM 1 QUESTIONS WITH DETAILED VERIFIED
ANSWERS (100% CORRECT ANSWERS) /ALREADY GRADED
How fast do electrons travel in a good conductor? What is this velocity
called? Ans✓✓✓0.1 mm/s drift velocity
The prongs on a typical grounded plug are more properly called what?
What about the receptacle? Ans✓✓✓Blades and ground pin;
Receptacle: slots and ground hole
What's the voltage of a typical wall socket in the U.S.? Ans✓✓✓120 V
Do birds land on distribution lines? Do they land on any wires? Explain
why or why not. Ans✓✓✓Birds land on all cables, and particularly like
the heat of distribution lines in the winter.
What's the meaning of the ground node in the node voltage analysis of a
circuit. Ans✓✓✓It's the reference node and has 0V potential relative to
itself.
How much current flows in a typical lightning bolt? Ans✓✓✓on the
order of 10 kA - 40 kA
What's the voltage of a car battery? How is it set up? Ans✓✓✓12 V
6 cells are connected in series, with 2 volts per cell
, What is in one cell? Ans✓✓✓- Sulfuric Acid (H2SO4) + water
(electrolyte)
- 2 plates
----> 1 plate made of sponge lead
----> 1 plate made of lead dioxide
What does the chemical reaction of sulfuric acid on lead produce...
Ans✓✓✓Lead sulfate and e- are liberated
Voltmeters measure the voltage drop from... Ans✓✓✓The red probe to
the black probe
Does the red probe connect to the positive or negative terminal?
Ans✓✓✓Positive
Does the black probe connect to the positive or negative terminal?
Ans✓✓✓Negative
A complete description of voltage requires which two things?
Ans✓✓✓1) A value (positive or negative)
2) Direction (given by polarities)
What's another way to describe Amps? Ans✓✓✓C/s
ANSWERS (100% CORRECT ANSWERS) /ALREADY GRADED
How fast do electrons travel in a good conductor? What is this velocity
called? Ans✓✓✓0.1 mm/s drift velocity
The prongs on a typical grounded plug are more properly called what?
What about the receptacle? Ans✓✓✓Blades and ground pin;
Receptacle: slots and ground hole
What's the voltage of a typical wall socket in the U.S.? Ans✓✓✓120 V
Do birds land on distribution lines? Do they land on any wires? Explain
why or why not. Ans✓✓✓Birds land on all cables, and particularly like
the heat of distribution lines in the winter.
What's the meaning of the ground node in the node voltage analysis of a
circuit. Ans✓✓✓It's the reference node and has 0V potential relative to
itself.
How much current flows in a typical lightning bolt? Ans✓✓✓on the
order of 10 kA - 40 kA
What's the voltage of a car battery? How is it set up? Ans✓✓✓12 V
6 cells are connected in series, with 2 volts per cell
, What is in one cell? Ans✓✓✓- Sulfuric Acid (H2SO4) + water
(electrolyte)
- 2 plates
----> 1 plate made of sponge lead
----> 1 plate made of lead dioxide
What does the chemical reaction of sulfuric acid on lead produce...
Ans✓✓✓Lead sulfate and e- are liberated
Voltmeters measure the voltage drop from... Ans✓✓✓The red probe to
the black probe
Does the red probe connect to the positive or negative terminal?
Ans✓✓✓Positive
Does the black probe connect to the positive or negative terminal?
Ans✓✓✓Negative
A complete description of voltage requires which two things?
Ans✓✓✓1) A value (positive or negative)
2) Direction (given by polarities)
What's another way to describe Amps? Ans✓✓✓C/s
