Current electricity is .

build-up of electric charge

a flow of electric charge

the push in a simple circuit

a positive charge

when cloud cover increases then the suns ray's which provides the earth with light and warmth gets covered due to the due to the suns ray's being blocked, the temperature in that region

therefore to conclude i would like to say that,

=more the cloud cover, the lesser the

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c)as speed changes, wavelength and frequency change.

everything changes!