FIRST QUARTER EXAMINATION IN ELECTRONICS 10
DIRECTIONS: Read and analyze each statements and select the letter of your best answer.
1. What is the difference between a conductor and an insulator?
a. An insulator allows electricity to flow through it easily and a conductor does not
b. A conductor allows electricity to flow through it easily and an insulator does not.
c. An insulator is magnetic and a conductor is not
d. A conductor is magnetic and an insulator is not
2. Which one is an insulator?
a. Silver
b. Copper c. pencil d.plastic
3. A metal spoon that gets warm when used to stir hot soup is an example of_______
a. Conduction b. Convection c. Radiation d. Insulation
4. A 4 band resistor's first three color bands are brown, black, and red. What is its value?
a. 10 Ω
b. 10 kΩ
c. 200 Ω
d. 1000 Ω
5. Which digit on the 1st band does the color yellow denote on a resistor color band?
a. 3
b. 2
c. 4
d. 7
6. A 4 band 47K ohm resistor would have which colors on its first three bands?
a. Yellow, Violet, White
b. Yellow, Violet, Orange
c. Red, White, Blue
d. Orange, Yellow, Violet
7. Which digit does the color orange denote on a resistor color band?
a. 2
b. 4
c. 3
d. 5
8. Which of these colors is NOT used in the resistor value color code?
a. White
b. Black
c. Violet
d.Pink
9. The gold color band refers to a tolerance of _________.
a. + / - 20%
b.+ / - 10%
c. + / - 5%
d. zero
10. What is the tolerance for a Red, Brown, Brown, Silver resistor?
a. 1%
b. 20%
c. 5%
d. 10%
11. What color has a multiplier of x1000 ?
a. Red
b. Orange
c. Blue
d.Brown
12. What is the resistance for a 4 band Red, Green, Blue color resistor?
a. 250,000 Ω
b. 25 kΩ
c. 25,000,000 Ω d.250 kΩ
13. The first two color bands of a resistor are __________.
a. Always Red In Color b. Digits c. Tolerance
d. Gold or Silver
14. What is the function of a resistor?
a. Stop current flow
b. Limit voltage
c. Limit current flow
d. To light up
15. What does L.E.D stand for?
a.
b.
c.
d.
Light Emitting Diode
Long Everlasting Diode
Let's Eat Doritos
Light Emitting Device
16. What is the name of the basic electronic component shown in the picture below?
a. Resistor
b. capacitor
17. What does I.C. stand for?
c. battery
d. diode
a. Inside Component
b. Integrated Component c. Integral Circuit
d. Integrated Circuit
18. What is the name of the basic electronic component shown in the picture below?
a. a diode
b. a turner offer
c. a rocker switch
d. a logic gate
19. Which of the following components this symbol represents?
a. Capacitor
b. Resistor c. Diode
d. Inductor
20. Which of the following is the function of this component?
a. store electrical charge
b. create various kinds of time delays in a circuit
c. act as a variable resistor
d. indicate the presence of current
21. Which of the following shows correct symbol for a battery.
a.
b.
c.
d.
FOR ITEMS 2230 WRITE TRUE IF
THE STATEMENT IS CORRECT AND WRITE FALSE IF IT IS NOT,
AND GIVE THE CORRECT WORDS/ PHRASE TO MAKE IT CORRECT.
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Circuit breakers are more commonly used than fuses.
The entrance panel in a home is the point where the "service" ends.
Fasteners used to connect two electrical conductors are usually called wire nuts.
It is important to report accidents to your instructor, no matter how small they may seem to be.
It is unsafe for you to work with electricity when you are wet or standing in water.
It is much safer to pull an electrical cord by pulling the cord instead of the plug.
The motion of electrons through an insulator gives us electric current.
Electronics is the branch of physics and technology concerned with the design of circuits using transistors and
microchips, and with the behavior and movement of electrons in a semiconductor, conductor, vacuum, or gas.
Ampere is the unit of measure for current.
What unit of measure is for resistance?
a. Ohms
b. ampere
c. voltage
d. watts
Calculate the Voltage of a circuit that has a resistance of 5 Ω and a current of 2 A
a. 25 V
b. 10
c. 2.5 V
d. 0.4 V
If the voltage is increased and the resistance stays the same, what will current do?
a. Increase b. Decrease
c. Stay the same d.none of the above
How many Volts would we need to produce a current flow of 8 Amps through a 6 Ohm resistor
a. 12 volts
b. 24 volts
c. 1.333
d. 48 volts
How many Volts would it take to push 1 Amp through a resistance of 1 Ohm
36.
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a. 10 volts
b. 1 volt
c. 48 volts
d. 5 volts
An alarm clock draws 0.5 A of current when connected to a 120 volt circuit. Calculate its resistance.
a. 60Ω
b. 120Ω
c. 180Ω
d. 240Ω
This refers to the quality of an entrepreneur who is not afraid to do new things and take risks
a. Independent
b. Problem-solving & Decision-making Skills
c. Risk Taker
d. Self confident
A characteristic of an entrepreneur who looks at new ways of doing things and developing solutions to problems
a. Creative
b. Self confident
c. Risk taker
d. Responsible
A characteristic of an entrepreneur who does what he is supposed to do and is held accountable.
a. Responsible
b. Creative
c. Self motivated
d. Persistent
A characteristic of an entrepreneur who does not give up and keep on trying.
a. Persistent
b. Inquisitive
c. Goal oriented
d. Risk taker
For Items 41- 50.Give the functions/ uses of the following basic electrical tools.
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42.
43.
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45.
46.
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48.
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50.
Pliers
Hacksaw
Screw drivers
Side cutter
Wire splicer
Soldering iron
Soldering stand
Printed circuit board
Battery
Switch