With reference to ‘fuel cells’ in which hydrogen-rich fuel and oxygen are used to generate electricity. Consider the following statements: 1. If pure hydrogen is used as a fuel, the fuel cell emits heat and water as by-products. 2. Fuel cells can be used for powering buildings and not for small devices like laptop computers. 3. Fuel cells produce electricity in the form of Alternating Current (AC). Which of the statements given above is/are correct?

QUESTION

Hard

Environment & Ecology

Prelims 2015

With reference to ‘fuel cells’ in which hydrogen-rich fuel and oxygen are used to generate electricity. Consider the following statements:

If pure hydrogen is used as a fuel, the fuel cell emits heat and water as by-products.
Fuel cells can be used for powering buildings and not for small devices like laptop computers.
Fuel cells produce electricity in the form of Alternating Current (AC).

Which of the statements given above is/are correct?

Select an option to attempt

Explanation

When pure hydrogen reacts with oxygen in a fuel cell, the only byproducts are water and heat. This is an advantage of hydrogen fuel cells, making them a clean energy source with minimal emissions.

Fuel cells can be used for various applications, including powering small devices like laptops. Portable fuel cells are being developed for this purpose. While currently less common, they hold promise for the future.

Fuel cells actually produce electricity in the form of Direct Current (DC). In some applications, an inverter might be needed to convert the DC output to AC for compatibility with the electrical grid.

Therefore, the only correct answer is 1 only.

Trusted by 2L aspirants