Basic Electricity and Electronics
Module One – Terms and Definitions
1. Coulomb – is the unit of electrical charge
2. ( R ) Resistance – is the opposition to current flow. Measured in Ohms
3. (I) Current – is the movement of electrons (Coulombs per sec). Measured in Amps
4. ( V ) Voltage - – is a potential difference between two points. Measured in Volts
5. ( J ) Joule - is a unit of work or energy. Measured in Joules
6. Power – work or energy per unit of time. (Joules per second). Measured in Watts
Basic Electricity and Electronics
Module One – Quiz
1. Which device resists direct current?
a.
b.
c.
d.
Resistor
Capacitor
Inductor
Coil
2. Which of the following is a control device?
a.
b.
c.
d.
Resistor
Switch
Fuse
Ground
4. Which of the following is the symbol for current?
a. A
b. V
c. Ω
d. I
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7. A
a/an:
a.
b.
c.
d.
volt
is
Potential difference between two points
Unit of charge on an electron
Rate of flow of charge
Opposition to current flow
8. How many forms of Ohm’s Law are there?
a.
b.
c.
d.
One
Two
Three
Four
9. Energy is:
a.
b.
c.
d.
The
The
The
The
fundamental ability to do work
rate at which energy is used
amount when one joule is used in one second
maximum amount of power dissipated without damage
11. An electrical load is:
a.
b.
c.
d.
Any weight being carried
The amount of horsepower in a circuit
Any resistive element connected to a power supply
Taking more than four classes a semester
12. Which of the following is a unit of power?
a.
b.
c.
d.
Joule
Joule per second
Joule-second
Volt-ohm
13. When the voltage across a resister is doubled, the current will:
a.
b.
c.
d.
Triple
Halve
Double
Not change
14. When the resistance in a circuit is doubled, the current will:
a.
b.
c.
d.
Triple
Halve
Double
Not change
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17. What performs the work in an electric circuit?
a.
b.
c.
d.
Heat
Voltage
A resistor
Current
18. What is the definition of current?
a.
b.
c.
d.
The movement of electrons
Force created by the buildup of charge
Force times distance
A twisting or rotary force
19. What is the definition of voltage?
a.
b.
c.
d.
The movement of electrons
Force created by the buildup of charge
Force times distance
A twisting or rotary force
20. What is resistance?
a.
b.
c.
d.
The interaction of two magnetic fields
Conversion of mechanical energy into electrical energy
An imbalance between electrons and protons
The opposition to current flow
21. What is the formula for Ohm’s Law?
a.
b.
c.
d.
P=VI
I=V/R
F=MA
I = V2 R
24. The unit of resistance is the:
a.
b.
c.
d.
Coulomb
Joule
Ampere
Ohm
25. The unit of electrical charge is the:
a.
b.
c.
d.
Coulomb
Joule
Ampere
Ohm
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26. A circuit has a 12 V power supply and a 1 kΩ resistor. What is the current?
27. A circuit has a 42 kΩ resistor and 8 mA of current. What is the voltage?
28. A circuit has 520 milli amps of current and 240 volts. What is the
resistance?
30. A circuit has 470 kΩ and 16 V. What is the current?
31. I = 145 mA, R = 10 MΩ. V = ?
32. In the following circuit calculate current and voltage drops.
R1 = 2 KΩ
VS =
12V
R2 = 4 KΩ
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33. In the following circuit, calculate total current and total resistance.
VS =
18V
R2 = 4kΩ
R1 = 2kΩ
34. In the following circuit, what is R1?
R1
VS =
12V
R2 = 4 KΩ
I = 1 mA
36. What is R2 in the following circuit?
IT = 12 mA
VS =
18V
R1 =
2kΩ
R2 = ?
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