Here is Question No. 65 a part of our series on UPSC Prelims 2021.
Q65. Magnetite particles suspected to cause neurodegenerative problems are generated as environmental pollutants from which of the following?
- Brakes of motor vehicles
- Engines of motor vehicles
- Microwave stoves within homes
- Power plants
- Telephone lines
Select the correct answer using the code given below.
a) 1, 2, 3 and 5 only
b) 1, 2 and 4 only
c) 3, 4 and 5 only
d) 1, 2, 3, 4 and 5
Answer: (d)
- Option 1 is correct: The automotive industry uses ceramic or ferrite magnets to make vehicles safer. One of the most impressive uses is in the Anti-lock Braking System (ABS) of vehicles. This use of magnets in motor vehicles can generate magnetic particles.
- Option 2 is correct: Engines of motor vehicles can generate magnetic particles as they use high-powered magnets which generate magnetic flux
- Option 3 is correct: In the Microwave, a magnetic stirrer is used which can generate magnetic particles.
- Option 4 is correct: Power Plants release metal content along with ash. Use of coal in power plants is a major source of combustion-associated magnetite fine particles.
- Option 5 is correct: The telephone line produces low-frequency, low-energy electromagnetic fields which are the potential source of magnetite particles.
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