RF-EMF_KKM_26-28 MEI 2025

Which of the following statements about RF-EMF propagation is TRUE? 

• RF-EMF travels only in straight lines and cannot be reflected.

• RF-EMF exposure is higher the further you are from the antenna. 
  

• RF waves propagate similarly to visible light and follow the inverse square law.

• Antennas always emit RF-EMF equally in all directions.

Why does increasing the number of cellular base stations reduce RF-EMF exposure from mobile phones? 

• It allows phones to use higher transmission power.

• It increases signal interference and noise.

• It shortens the distance to the nearest base station, so phones use lower power. 
  

• It eliminates the need for modulation.

Satellite TV broadcasting such as Astro contributes significantly to indoor RF-EMF exposure. 

 

• TRUE

• FALSE

Beamforming technology in 5G networks helps reduce unnecessary RF-EMF exposure by directing signals toward users. 

• TRUE

• FALSE

EM wave requires a medium to propagate?

• TRUE

• FALSE

EMF radiation originates from

• Man-made sources only

• Natural sources only

• Both man-made and natural sources

• Artificial sources only

Which of the following is NOT an EM wave?

• Visible light

• Infrared

• X-ray

• Sound

Radio Frequency EMF radiation _____________

• has low energy and it’s non-ionizing

• has high energy and it’s non-ionizing

• has low energy and it’s ionizing

• has high energy and it’s ionizing

A mobile phone has become an indispensable part of modern daily life, resulting in both positive and negative effects. From the following statements, which one does not refer to the social negative effects of using a mobile phone? 

• Longer working hours, even at home, during weekends, and holidays. 

• Planner and reminder for daily life routine 

• Continue thinking about the jobs and tasks assigned, as they can be instructed, directed, or reminded of at any time. 

• Divided focus while completing a task 

Radio frequency (RF) signal is classified as a non-ionizing. State the effect of the radiation exposure from this RF signal. 

• Shivering 

• Tingling 

• Heating 

• Dizzy