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Q 1/30
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1. Emiel bought a new air conditioning unit. He called someone to install the unit in his room. He was told by the electrician that he would need a circuit breaker aside from other electrical materials. Why would he need a circuit breaker?
120
Circuit breaker acts as a remote control to turn on and off the unit.
Circuit breaker allows the appliance to save more energy.
Circuit breaker does not possess any significant function in electricity.
Circuit breaker offers protection by tripping and cutting off the supply to load in case of fault.
Q 2/30
Score 0
2. Which of the following does NOT match the term and its unit?
120
voltage - volts
current - farad
None of these
resistance - ohms
30 questions
Q.
1. Emiel bought a new air conditioning unit. He called someone to install the unit in his room. He was told by the electrician that he would need a circuit breaker aside from other electrical materials. Why would he need a circuit breaker?
1
120 sec
Q.
2. Which of the following does NOT match the term and its unit?
2
120 sec
Q.
3. It is a force that pushes the electrons creating a current along the circuit.
3
120 sec
Q.
4. Which of the following is not true about resistance?
4
120 sec
Q.
5. Based on the circuit diagram, what is the value of voltage coming out from the battery?
5
120 sec
Q.
6. Longer wire and smaller in diameter wire offers a greater resistances.
6
120 sec
Q.
7. A material that blocks the flow of electricity is called ______, while the material that allows electricity to flow is _______.
7
120 sec
Q.
8. Which of the following best describes voltage?
8
120 sec
Q.
9. Ezra received an appliance from her cousin who lives in America. After checking the appliance, she noticed that the value of voltage is different from her outlets. The voltage of the appliance is 120 volts while her outlet is 220 volts. What does it mean?
9
120 sec
Q.
10. What Greek letter is used to represent the unit ohm?
10
120 sec
Q.
11. What does letter “I” stands for in Ohm’s Law?
11
120 sec
Q.
12. According to Ohm’s law, the current through a conductor between two points is directly proportional to the voltage across the two point. What happens to the current when the voltage increases?
12
120 sec
Q.
13. Which of the following best describes the Ohm’s Law?
13
120 sec
Q.
14. A current of 1.5 A is passing through a conductor with a 10.5 V power source. What is the resistance of the circuit?
14
120 sec
Q.
15. Juliet loves to read novels at night. When reading, Juliet wants to have an ambient light. So it’s her practice to dim her lampshade by adjusting the knob on it. Which factor was changed to dim the light of the lampshade?
15
120 sec
Q.
16. Which of the following best applies the Ohm’s Law?
16
120 sec
Q.
17. John Ezekiel is working on his science project. He used a 12-volt battery to light up the bulb. If the current of the circuit is 0.5 A, what is the resistance drawn by the bulb?
17
120 sec
Q.
18. A voltage across 21 Ω resistor is 9 V. What is the current passing through the resistor?
18
120 sec
Q.
19. How much voltage is required to produce a current of 32 A along a copper wire? Consider that the resistance value of a copper wire is 0.02 Ω.
19
120 sec
Q.
20. What equation would you use to solve for resistance?
20
120 sec
Q.
21. What will happen to the resistance of a series circuit if the number of resistors increases?
21
120 sec
Q.
22. John Brian is fixing his electrical wiring at home. After fixing the electrical system, he turned on the circuit breaker from him main panel. He noticed that all of the bulbs are not functioning from his room down to all parts of the house. He saw a wire being disconnected. He connected the wire and all bulbs switched on. What does it imply?
22
120 sec
Q.
23. All of the components in a series circuit share the same current.
23
120 sec
Q.
24. Three resistors are connected to a 9-V battery in a series circuit: the first uses 4-V, the second uses 2-V and the third uses 3-V.
24
120 sec
Q.
25. The formula to compute the total resistance in a series circuit is RT = R1 + R2 + R3... Which of the following is correct about the equation?
25
120 sec
Q.
26. What is the total resistance in the circuit?
26
120 sec
Q.
27. What is the value of second resistor if the total resistance is 25 ohms?
27
120 sec
Q.
28. What will happen to the resistance of a series circuit if the number of resistors decreases?
28
120 sec
Q.
29. In series circuit, the current is the same through each resistor.
29
120 sec
Q.
30. Analyze the illustration. What do think will happen to the brightness of the bulb when the 5-Ω resistor is replaced with a 2-Ω resistor?
