Gibilisco - Cells And Batteries
- 1.
The chemical energy in a battery or cell
- A.
Is a form of kinetic energy.
- B.
Cannot be replenished once it is gone.
- C.
Changes to electrical energy when the cell is used.
- D.
Is caused by electric current.
Correct Answer
C. Changes to electrical energy when the cell is used.Explanation
The chemical energy in a battery or cell is converted into electrical energy when the cell is used. This conversion occurs through a chemical reaction within the battery, which generates electrons that flow through a circuit, creating an electric current. Once the chemical energy is used up, the battery cannot be replenished and needs to be replaced. Therefore, the correct answer is that the chemical energy changes to electrical energy when the cell is used.Rate this question:
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- 2.
A cell that cannot be recharged is known as
- A.
A dry cell.
- B.
A wet cell.
- C.
A primary cell.
- D.
Secondary cell.
Correct Answer
C. A primary cell.Explanation
A cell that cannot be recharged is known as a primary cell. Primary cells are designed for single-use and once their energy is depleted, they cannot be recharged. In contrast, secondary cells, such as rechargeable batteries, can be recharged multiple times. Therefore, a primary cell is the correct answer in this context.Rate this question:
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- 3.
A Weston cell is generally used
- A.
As a current reference source.
- B.
As a voltage reference source.
- C.
As a power reference source.
- D.
As a fuel cell.
Correct Answer
B. As a voltage reference source.Explanation
A Weston cell is generally used as a voltage reference source. This is because a Weston cell produces a stable and accurate voltage output, making it suitable for calibrating and comparing other voltage sources. It consists of a cadmium sulfate solution and a mercury cadmium amalgam, which create a constant voltage when connected in a circuit. The voltage produced by a Weston cell remains constant over time and is not affected by temperature changes, making it an ideal choice for applications that require precise voltage references.Rate this question:
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- 4.
The voltage produced by a battery of multiple cells connected in series is
- A.
Less than the voltage produced by a cell of the same composition.
- B.
The same as the voltage produced by a cell of the same composition.
- C.
More than the voltage produced by a cell of the same composition.
- D.
Always a whole-number multiple of 1.018 V.
Correct Answer
C. More than the voltage produced by a cell of the same composition.Explanation
When multiple cells are connected in series, the individual voltages of each cell are added together. This means that the total voltage produced by the battery is greater than the voltage produced by a single cell of the same composition. Therefore, the correct answer is "more than the voltage produced by a cell of the same composition."Rate this question:
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- 5.
A direct short-circuit of a large battery can cause
- A.
An increase in its voltage.
- B.
No harm other than a rapid discharge of its energy.
- C.
The current to drop to zero.
- D.
A physical rupture or explosion.
Correct Answer
D. A pHysical rupture or explosion.Explanation
A direct short-circuit of a large battery can cause a physical rupture or explosion. When a short circuit occurs, the resistance in the circuit decreases significantly, causing a surge in current flow. This surge generates excessive heat, which can lead to the battery overheating and potentially rupturing or exploding. This is a dangerous situation as it can cause damage to the battery and surrounding objects, as well as pose a risk of injury to individuals nearby.Rate this question:
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- 6.
Suppose a cell of 1.5 V delivers 100 mA for 7 hours and 20 minutes, and then it is replaced.How much energy is supplied during this time?
- A.
0.49 Wh
- B.
1.1 Wh
- C.
7.33 Wh
- D.
733 mWh
Correct Answer
B. 1.1 WhExplanation
The energy supplied can be calculated by multiplying the voltage (1.5 V) by the current (100 mA) to get the power (0.15 W). Then, multiply the power by the time (7 hours and 20 minutes) converted to hours (7.33 hours) to get the energy supplied in watt-hours (1.0995 Wh). Rounded to two decimal places, the answer is 1.1 Wh.Rate this question:
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- 7.
Suppose a 12-V automotive battery is rated at 36 Ah. If a 100-W, 12-V bulb is connectedacross this battery, approximately how long will the bulb stay aglow, assuming the battery has been fully charged?
- A.
4 hours and 20 minutes
- B.
432 hours
- C.
3.6 hours
- D.
21.6 minutes
Correct Answer
A. 4 hours and 20 minutesExplanation
The 12-V automotive battery is rated at 36 Ah, which means it can supply a current of 36 Amps for 1 hour. The 100-W, 12-V bulb will draw a current of 100/12 = 8.33 Amps. Therefore, the battery will be able to power the bulb for 36/8.33 = 4.32 hours. Converting this to minutes, we get 4 hours and 20 minutes. Therefore, the bulb will stay aglow for approximately 4 hours and 20 minutes.Rate this question:
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- 8.
Alkaline cells
- A.
Are cheaper than zinc-carbon cells.
- B.
Generally work better in radios than zinc-carbon cells.
- C.
Have higher voltages than zinc-carbon cells.
- D.
Have shorter shelf lives than zinc-carbon cells.
Correct Answer
B. Generally work better in radios than zinc-carbon cells.Explanation
Alkaline cells generally work better in radios than zinc-carbon cells because they have a higher energy density and can provide a more stable and consistent power supply. This is important for radios as they require a continuous and reliable source of power to function properly. Additionally, alkaline cells have a longer runtime and can last longer in high-drain devices like radios compared to zinc-carbon cells.Rate this question:
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- 9.
The energy in a cell or battery depends mainly on
- A.
Its physical size.
- B.
The current drawn from it.
- C.
Its voltage.
- D.
All of the above.
Correct Answer
A. Its pHysical size.Explanation
The energy in a cell or battery depends mainly on its physical size. This is because the size determines the amount of active material present in the cell, which directly affects the energy storage capacity. The larger the size, the more active material can be accommodated, resulting in higher energy storage. While the current drawn from the cell and its voltage also play a role in determining the energy output, they are not the primary factors.Rate this question:
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- 10.
In which of the following devices would a lantern battery most likely be found?
- A.
A heart pacemaker
- B.
An electronic calculator
- C.
An LCD wall clock
- D.
A two-way portable radio
Correct Answer
D. A two-way portable radioExplanation
A lantern battery would most likely be found in a two-way portable radio because lantern batteries are typically used in devices that require a larger power source and longer battery life. A two-way portable radio is often used in outdoor settings or in situations where a reliable and long-lasting power source is needed, making it the most suitable device for a lantern battery.Rate this question:
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- 11.
In which of the following devices would a transistor battery be the best power choice?
- A.
A heart pacemaker
- B.
An electronic calculator
- C.
An LCD wall clock
- D.
A two-way portable radio
Correct Answer
B. An electronic calculatorExplanation
A transistor battery would be the best power choice for an electronic calculator because calculators require low power consumption and a small, compact power source. Transistor batteries are small, lightweight, and have a long lifespan, making them ideal for portable electronic devices like calculators. Additionally, transistor batteries provide a stable power supply, ensuring accurate calculations.Rate this question:
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- 12.
For which of the following applications would you choose a lithium battery?
- A.
A microcomputer memory backup
- B.
A two-way portable radio
- C.
A stand-alone solar-electric system
- D.
A rechargeable lantern
Correct Answer
A. A microcomputer memory backupExplanation
A lithium battery would be the ideal choice for a microcomputer memory backup because it offers a high energy density, long shelf life, and low self-discharge rate. These characteristics make it suitable for providing a reliable and long-lasting power source for storing important data in a microcomputer memory backup system. Additionally, lithium batteries have a fast recharge time and can handle multiple charge-discharge cycles, making them well-suited for this application.Rate this question:
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- 13.
Where would you most likely find a lead-acid battery?
- A.
In a portable audio CD player
- B.
In an uninterruptible power supply
- C.
In an LCD wall clock
- D.
In a flashlight
Correct Answer
B. In an uninterruptible power supplyExplanation
A lead-acid battery is commonly used in uninterruptible power supplies (UPS) as they provide a reliable and long-lasting power source. UPS devices are designed to provide backup power in case of a power outage or fluctuation, ensuring uninterrupted operation of critical equipment such as computers, servers, and telecommunications systems. The high capacity and ability to deliver a sustained amount of power make lead-acid batteries ideal for this application. They are not typically found in portable audio CD players, LCD wall clocks, or flashlights, which usually use smaller and lighter battery types.Rate this question:
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- 14.
A cell or battery that maintains a constant current-delivering capability almost until it dies issaid to have
- A.
A large ampere-hour rating.
- B.
Excellent energy capacity.
- C.
A flat discharge curve.
- D.
Good energy storage capacity per unit volume.
Correct Answer
C. A flat discharge curve.Explanation
A cell or battery that maintains a constant current-delivering capability almost until it dies is said to have a flat discharge curve. This means that the voltage output remains relatively stable throughout the battery's life, indicating a consistent energy delivery. This is desirable as it allows for more accurate monitoring of the battery's remaining capacity and prevents sudden drops in performance.Rate this question:
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- 15.
Where might you find a nickel-based battery?
- A.
In a satellite
- B.
In a portable cassette player
- C.
In a handheld radio transceiver
- D.
More than one of the above
Correct Answer
D. More than one of the aboveExplanation
A nickel-based battery can be found in more than one of the given options. It is commonly used in satellites for their power supply. Additionally, it is also used in portable cassette players and handheld radio transceivers. Therefore, the correct answer is "More than one of the above."Rate this question:
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- 16.
A disadvantage of mercury cells and batteries is the fact that
- A.
They don’t last as long as other types.
- B.
They have a flat discharge curve.
- C.
Mercury is destructive to the environment.
- D.
They need to be recharged often.
Correct Answer
C. Mercury is destructive to the environment.Explanation
Mercury cells and batteries have a disadvantage in that they are destructive to the environment. Mercury is a toxic substance that can cause serious harm to living organisms and ecosystems if it is released into the environment. When these cells and batteries are disposed of improperly, the mercury can leach into soil and water sources, contaminating them and posing a risk to both human health and the environment. Therefore, the use of mercury in these cells and batteries is a significant drawback due to its negative impact on the environment.Rate this question:
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- 17.
Which kind of battery should never be used until it dies?
- A.
Silver-oxide
- B.
Lead-acid
- C.
Nickel-based
- D.
Mercury
Correct Answer
C. Nickel-basedExplanation
Nickel-based batteries should never be used until they die because they have a "memory effect." This means that if they are repeatedly recharged before being fully discharged, they will gradually lose their maximum capacity. To maintain optimal performance, nickel-based batteries should be discharged fully before recharging.Rate this question:
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- 18.
The useful current that is delivered by a solar panel can be increased by
- A.
Connecting capacitors in parallel with the solar cells.
- B.
Connecting resistors in series with the solar cells.
- C.
Connecting two or more groups of solar cells in parallel.
- D.
Connecting resistors in parallel with the solar cells.
Correct Answer
C. Connecting two or more groups of solar cells in parallel.Explanation
Connecting two or more groups of solar cells in parallel increases the useful current delivered by a solar panel. When solar cells are connected in parallel, the total current produced by the cells is the sum of the currents produced by each individual cell. This increases the overall current output of the solar panel, making it more efficient in delivering power.Rate this question:
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- 19.
An interactive solar power system
- A.
Allows a homeowner to sell power to the electric company.
- B.
Lets the batteries recharge at night.
- C.
Powers lights, but not electronic devices.
- D.
Is totally independent from the electric company.
Correct Answer
A. Allows a homeowner to sell power to the electric company.Explanation
An interactive solar power system allows a homeowner to sell power to the electric company because it generates excess electricity that can be fed back into the grid. This allows the homeowner to earn credits or receive payment for the surplus energy produced by their solar panels. It promotes renewable energy generation and incentivizes homeowners to invest in solar power systems.Rate this question:
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- 20.
An advantage of methanol over hydrogen for use in fuel cells is the fact that
- A.
Methanol is the most abundant element in the universe.
- B.
Methanol is not flammable.
- C.
Methanol is a solid at room temperature.
- D.
Methanol is easier to transport and store.
Correct Answer
D. Methanol is easier to transport and store.Explanation
Methanol is easier to transport and store compared to hydrogen because it can be easily liquefied and stored at room temperature and pressure, whereas hydrogen requires high-pressure tanks or cryogenic storage. Methanol also has a higher energy density, meaning that a smaller volume of methanol can provide the same amount of energy as a larger volume of hydrogen. This makes methanol a more practical and efficient option for fuel cells, especially in applications where transportation and storage are important factors.Rate this question:
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Sep 02, 2023Quiz Edited by
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Dec 16, 2010Quiz Created by
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