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Which type of electromagnetic waves travels to the ionosphere and is reflected back to Earth?
Radio waves
Why are microwaves used for long-distance transmission?
They have high frequencies that travel to the ionosphere.
What property of all types of electromagnetic waves does not change when they travel in a vacuum?
Speed
What is the difference between mechanical and electromagnetic waves?
Ability to transmit energy through a medium.
What type of waves are the water ripples on the surface of water?
Transverse waves
If a water wave has more vibration, apart from its frequency, what property will change?
Wavelength
Which is the primary property of fuses?
Low melting point
Which quantity is measured in volts?
Potential difference
Which tool is used to measure electric current in a circuit?
Ammeter
How does electric current flow?
From high to low potential


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