Electromagnetism 101 Nat Geo

What happens when two electric charges of the same type interact?

• They attract

• They repel

• They neutralize each other

• They combine

What determines the intensity of electromagnetic radiation?

• Its wavelength

• Its amplitude

• Its frequency

• Its speed

Which type of electromagnetic wave is used for medical applications like cancer treatment?

• Radio waves

• Microwaves

• Ultraviolet rays

• Gamma rays

What is the process called that causes Earth's poles to attain positive and negative charges, turning the planet into a giant electromagnet?

• Geomagnetism

• Geodynamo

• Electromagnetic Induction

• Polar Reversal