Q. Magnetite particles, suspected to cause neurodegenerative problems, are generated as environmental pollutants from which of the following?
1. Brakes of motor vehicles
2. Engines of motor vehicles
3. Microwave stoves within homes
4. Power plants
5. 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] 3, 4 and 5 only

Answer: D

Why this question:  

  • Human exposure to electromagnetic fields in the context of 5G technology. 
  • Important static topic: Pollution and impact on human health 

Ans) d 

Exp) Option d is correct. 

Magnetite particles can act as pollutants and led to neurodegenerative problems. Magnetic particles can penetrate and damage the blood-brain-barrier and led to the early development of Alzheimer’s disease. 

Whenever any magnetic component is used in appliances, they generate magnetic flux which produces magnetic particles 

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. These 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 Microwave, a magnetic stirrer is used which can generate magnetic particles. 

 Option 4 is correct. Power Plants releases 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. Telephone line produces low frequency, low energy electromagnetic field which are the potential source of magnetite particles. 

Source) https://www.thehindu.com/news/national/telangana/telecom-mobile-towers-are-within-prescribed-norms-affirms-dot/article33973886.ece  




Subject) Environment