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Banking Exams Exam  >  Banking Exams Questions  >  What is the main objective of a Proton Exchan... Start Learning for Free
What is the main objective of a Proton Exchange Membrane (PEM) fuel cell technology?
  • a)
    Generate electricity from hydrogen
  • b)
    Produce clean drinking water
  • c)
    Extract natural gas from the ground
  • d)
    Convert solar energy into electricity
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
What is the main objective of a Proton Exchange Membrane (PEM) fuel ce...
Objective of a Proton Exchange Membrane (PEM) fuel cell technology:

The main objective of a Proton Exchange Membrane (PEM) fuel cell technology is to generate electricity from hydrogen. This technology is a type of fuel cell that uses a solid polymer membrane (proton exchange membrane) as the electrolyte. It operates at relatively low temperatures (typically below 100 degrees Celsius) and can efficiently convert the chemical energy in hydrogen fuel into electrical energy.

Explanation:

1. Introduction to PEM fuel cell technology:
- A Proton Exchange Membrane (PEM) fuel cell technology is a clean and efficient energy conversion device that operates on the principle of electrochemical reactions.
- It consists of two electrodes (anode and cathode) separated by a proton exchange membrane. The anode is the negative electrode, while the cathode is the positive electrode.
- Hydrogen gas is supplied to the anode, and oxygen or air is supplied to the cathode.
- The hydrogen molecules at the anode are split into protons (H+) and electrons (e-) through a process called electrochemical oxidation.

2. Electrochemical reactions:
- At the anode, hydrogen gas molecules (H2) are split into protons (H+) and electrons (e-) through a process called electrochemical oxidation.
- The protons (H+) pass through the proton exchange membrane, while the electrons (e-) travel through an external circuit, generating electrical current.
- At the cathode, the protons (H+) and electrons (e-) combine with oxygen (O2) to form water (H2O) through a process called electrochemical reduction.

3. Electricity generation:
- The main objective of a PEM fuel cell technology is to generate electricity from the electrochemical reactions occurring at the anode and cathode.
- The movement of protons (H+) through the proton exchange membrane generates an electric current, which can be utilized to power various electrical devices and systems.
- The conversion of chemical energy in hydrogen fuel to electrical energy is highly efficient, with minimal waste heat production.

4. Advantages of PEM fuel cell technology:
- PEM fuel cells offer several advantages over other types of fuel cells, including high power density, fast startup and response times, and suitability for portable and automotive applications.
- They produce clean electricity with zero emissions of pollutants or greenhouse gases, as the only byproduct of the electrochemical reactions is water.
- PEM fuel cells can be used in various sectors, including transportation, backup power systems, and stationary power generation, contributing to a more sustainable and environmentally friendly energy landscape.

In conclusion, the main objective of a Proton Exchange Membrane (PEM) fuel cell technology is to efficiently generate electricity from hydrogen fuel through electrochemical reactions. It offers a clean and efficient alternative to traditional energy sources, contributing to a more sustainable and environmentally friendly future.
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What is the main objective of a Proton Exchange Membrane (PEM) fuel ce...
The main objective of Proton Exchange Membrane (PEM) fuel cell technology is to generate electricity from hydrogen, providing a clean and efficient energy source.
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Direction: Read the passage and answer the question based on it.Much has been said about the mining of cryptocurrencies and how the process guzzles electricity. Mining is a process that creates new digital coins by solving complex mathematical problems using very powerful computers, day and night, non-stop. That wouldn't be a problem if it were only a few computers in use. As of February 19, for example, Bitcoin mining was thought to consume more than 51,000 Gigawatts hours of electricity each year worldwide, according to Digiconomist, an online cryptocurrency hub. That's five and half times as much the power used by Zimbabwe, a developing nation, for the whole of 2O15. There is no known corporate mining rig in Zimbabwe, though some individuals have decided to dip their toes into the mining waters. 41000 people trading crypto on the local exchange are to some degree mining on their personal computers. Obviously, these aren't all the Zimbabweans but there is also no administrative source on power use involving crypto-mining.Digiconomist has produced a model for calculating electricity use from Bitcoin mining that is widely used across the world, which could help estimate the amount of energy used by citizens mining crypto in Zimbabwe. The formula, which depends on the performance of ordinary mining equipment, expresses the miner's operating costs as a percentage of the total mining revenues before converting the operating costs to the energy consumed. The conversion is based on the average cost of electricity. Manufacturers of cryptocurrency are introducing to the market more efficient mining technologies that minimize electricity use.Bitcoin is evolving into a big environmental nuisance. Its mining, reliant on coal-fired power stations in countries like China, a leading cryptocurrency market, emits the equivalent of 24.8 million tonnes of carbon dioxide each year. According to the UN expert panel on climate change, carbon dioxide is the number one driver of global warming and climate change, a phenomenon that has spewed frequent and intense droughts and floods in Zimbabwe in recent decades, with deadly effects.There is only about 16 million Bitcoin in circulation today. A maximum of 21 million Bitcoins can only ever be issued. Now, as long as there is any cryptocurrency — to mine, it seems plausible that global concern will not only focus on the legitimacy of a currency that exists only online but also its power-guzzling systems, which will deficit in the future. Zimbabwe could easily turn into a crypto-miners paradise if only the power supply was reliable. At 9,86c per kWh, the country has some of the cheapest electricity rates anywhere in the world. The average electricity cost across southern Africa is 50 percent higher compared to the local rate.Q. Which of the following can be the concluding sentence of the passage?

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What is the main objective of a Proton Exchange Membrane (PEM) fuel cell technology?a)Generate electricity from hydrogenb)Produce clean drinking waterc)Extract natural gas from the groundd)Convert solar energy into electricityCorrect answer is option 'A'. Can you explain this answer?
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