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.
