All object emit EM (electromagnetic) waves in ____ range at room temperature. a)

Question

All object emit EM (electromagnetic) waves in ____ range at room temperature.

a) infrared

b) visible

c) radio wave

d) gamma

2) Radio waves are primarily used for ______,

a) communication

b) heating a food

c) medical imaging

d night vision

3) which is not true about interation betwwen electricity and magnetism?

a) moving electric charge produces magnetic field.

b) Moving magnet produces electric field

c) A static charge ( one at rest) in magnetic field experience force.

d) oscillating electric and magnetic fields produce electromagnetic waves.

Explanation / Answer

1. infrared

2. communication

3. A static charge ( one at rest) in magnetic field experience force.

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