Electrical Circuit Test! Trivia Questions Quiz
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Questions and Answers
- 1.
Which of the following describes a series circuit?
- A.
Current flows along each branch
- B.
Bulbs are all in a loop
- C.
If one bulb breaks the other one still works
Correct Answer
B. Bulbs are all in a loopExplanation
A series circuit is a type of circuit where the components, in this case, the bulbs, are connected in a single loop or path. In a series circuit, the current flows through each component in the same direction, one after the other. If one bulb breaks or stops working, the current flow is interrupted, and all the bulbs in the circuit will stop working. This is because in a series circuit, the current has only one path to follow, and any interruption in that path will affect the entire circuit.Rate this question:
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- 2.
Which of the following describes a parallel circuit?
- A.
All bulbs light up together
- B.
If one bulb breaks the circuit is broken
- C.
Current flows along each branch
Correct Answer
C. Current flows along each branchExplanation
A parallel circuit is a type of electrical circuit where the components are connected in such a way that the current has multiple paths to flow through. In this configuration, the current divides and flows along each branch independently. Therefore, the statement "current flows along each branch" accurately describes a parallel circuit.Rate this question:
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- 3.
What units does the electrical current have?
- A.
Amps
- B.
Volts
- C.
Power
Correct Answer
A. AmpsExplanation
The correct answer is Amps. Amps is the unit used to measure electrical current. It represents the rate at which electric charge flows through a conductor. Volts, on the other hand, measure the electric potential difference or voltage, while power is measured in watts and represents the rate at which work is done or energy is transferred.Rate this question:
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- 4.
What is the symbol for a bulb or lamp?
- A.
A rectangle
- B.
A circle with an x
- C.
One big and one small line
- D.
A bulb shape with a coil inside
Correct Answer
B. A circle with an xExplanation
The symbol for a bulb or lamp is represented by a circle with an x. This symbol is commonly used to indicate that the object is a light source. The circle represents the bulb or lamp, while the x inside it represents that the light is turned off or not functioning.Rate this question:
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- 5.
What type of circuit do we find in our houses?
- A.
Parallel
- B.
Series
Correct Answer
A. ParallelExplanation
In our houses, we find parallel circuits. A parallel circuit is a type of circuit where the components are connected in such a way that there are multiple pathways for the current to flow. This means that if one component fails or is removed, the other components will continue to function independently. In our houses, various electrical appliances are connected in parallel, allowing us to use them simultaneously without affecting each other's operation.Rate this question:
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- 6.
When you move your brain uses electrical signals; these are called:
- A.
Nerve signals
- B.
Electrical signals
- C.
Impulses
Correct Answer
C. ImpulsesExplanation
When you move, your brain sends signals to different parts of your body through the nervous system. These signals are electrical in nature and are commonly referred to as impulses.Rate this question:
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- 7.
If your heart stops, doctors can try to start it again by using a
- A.
Electric shocker
- B.
Defibrillator
- C.
Pacemaker
Correct Answer
B. DefibrillatorExplanation
A defibrillator is used to restart the heart when it stops beating. It delivers an electric shock to the heart, which helps to restore its normal rhythm. This is different from a pacemaker, which is used to regulate and control the heart's rhythm. While a pacemaker can help to maintain a regular heartbeat, it is not designed to restart a heart that has stopped. Therefore, in the given scenario, a defibrillator would be the appropriate device to use in order to try to start the heart again.Rate this question:
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- 8.
When your skin is wet, electricity can pass through you
- A.
More easily
- B.
Harder
- C.
About the same as dry skin
Correct Answer
A. More easilyExplanation
When your skin is wet, the presence of moisture reduces its resistance to the flow of electricity. Water is a conductor of electricity, so when the skin is wet, it becomes a better conductor as well. This allows electricity to pass through the body more easily compared to when the skin is dry. Therefore, the correct answer is "more easily."Rate this question:
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- 9.
"In parallel" means that a circuit has:
- A.
One path
- B.
Two paths
- C.
Multiple paths
- D.
All of the above
Correct Answer
C. Multiple pathsExplanation
"In parallel" means that a circuit has multiple paths. This means that the components in the circuit are connected side by side, allowing the current to flow through each path simultaneously. By having multiple paths, the circuit can handle more current and provide different routes for the flow of electricity. This configuration is commonly used in electrical systems to distribute the load and increase the overall efficiency of the circuit.Rate this question:
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- 10.
What is the name of the law that keeps track of volts, ohms, and amperes?
- A.
Newton's Law Pascal's Law
- B.
Kirchoff's Law
- C.
Coulomb's Law
- D.
Ohm's Law
Correct Answer
D. Ohm's LawExplanation
Ohm's Law is the correct answer because it is the law that relates volts, ohms, and amperes in an electrical circuit. It states that the current flowing through a conductor is directly proportional to the voltage across the conductor and inversely proportional to the resistance of the conductor. This law is fundamental in understanding and calculating the behavior of electrical circuits.Rate this question:
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- 11.
When measuring ohms in a circuit, you are measuring:
- A.
Current
- B.
Voltage
- C.
Resistance
- D.
Power
Correct Answer
C. ResistanceExplanation
When measuring ohms in a circuit, you are measuring resistance. Resistance is the property of a material or component to impede the flow of electric current. It is measured in ohms and determines how much current will flow through a circuit for a given voltage. By measuring resistance, you can assess the opposition to the flow of current and determine the efficiency of the circuit.Rate this question:
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- 12.
Variable resistors are called:
- A.
Rheostats
- B.
Trimmers
- C.
Potentiometers
- D.
All of the above
Correct Answer
D. All of the aboveExplanation
Variable resistors can be referred to as rheostats, trimmers, or potentiometers. A rheostat is a type of variable resistor used to control current flow in a circuit. Trimmers are small variable resistors typically used for fine-tuning or adjusting circuit parameters. Potentiometers are variable resistors with three terminals, used to control voltage or provide variable resistance. Therefore, all of these terms can be used interchangeably to describe variable resistors.Rate this question:
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- 13.
How can you determine the value of a resistor?
- A.
Weigh the resistor
- B.
Read the color bands
- C.
Check the voltage
- D.
None of the above
Correct Answer
B. Read the color bandsExplanation
To determine the value of a resistor, one can read the color bands on it. Resistor manufacturers use a color coding system to indicate the resistance value. Each color represents a specific number, and by reading and interpreting the color bands, one can determine the resistance value of the resistor. Weighing the resistor or checking the voltage are not methods used to determine its value.Rate this question:
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- 14.
The formula RT = R1 + R2 + R3 indicates:
- A.
An open circuit
- B.
A short circuit
- C.
A parallel circuit
- D.
A series circuit
Correct Answer
D. A series circuitExplanation
The formula RT = R1 + R2 + R3 indicates a series circuit because in a series circuit, the total resistance (RT) is equal to the sum of the individual resistances (R1, R2, R3). In a series circuit, the current flows through each component in the circuit one after the other, and the total resistance increases as more resistors are added in series.Rate this question:
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- 15.
Direct current is current that flows
- A.
In two directions
- B.
In one direction only
- C.
Up and down
- D.
In pulses
Correct Answer
B. In one direction onlyExplanation
Direct current is a type of electric current that flows in one direction only. Unlike alternating current (AC), which periodically changes direction, direct current (DC) maintains a constant flow of electrons in a single direction. This is typically achieved using a power source such as a battery or a rectifier. DC is commonly used in applications that require a steady and continuous flow of electricity, such as in electronics, telecommunications, and certain types of motors.Rate this question:
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Current Version
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Mar 22, 2023Quiz Edited by
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Mar 11, 2014Quiz Created by
Dproane
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