14 Questions
What type of field exists whenever electric charges are present?
Electric field
What stands for the force exerted on charges when they move along the line between the charges?
Magnetic field
Which type of field lines always point away from a positive charge and towards a negative charge?
Electric field
How are magnetic fields arranged around an electric current?
In a circular fashion
What creates electromagnetic fields?
Movement of electric charge
What kind of force exists between charges that act on a line between the charges?
Electric force
What are EM waves created as a result of?
Vibrations between an electric field and a magnetic field
What are the small packets of energy in an EM wave called?
Photons
What is the relationship between frequency (f), wavelength (λ), and the speed of light (c)?
f x λ = c
Which of the following is a natural source of electromagnetic fields?
The Earth’s Magnetic Field
Which type of radiation has high enough energy to ionize particles of matter?
Gamma rays
What are the two most important health-related characteristics of EM fields?
Field strength and frequency
What effect does non-ionizing radiation have on matter?
Causing significant heating
What positive health effect does exposure to sunlight have?
Leads to vitamin D production
Test your understanding of the bio-effects of electric and magnetic fields, and the health implications of radiofrequency radiation. This quiz covers topics like electromagnetic interactions with biological systems, electromagnetic waves, and sources of electric and magnetic fields.
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