Physics
Which of the following is a device designed to protect electrical devices from voltage spikes?

Current unloader
Surge protector
Voltage unloader
Heat protector

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Physics
A white and smooth surface is

Good absorber and good reflector of heat
Bad absorber and good reflector of heat
Good absorber and bad reflector of heat
Bad absorber and bad reflector of heat

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Physics
Negative feedback in amplifiers

Increases bandwidth and increases noise
Decreases bandwidth and decreases noise
Decreases bandwidth and increases noise
Increases bandwidth and decreases noise

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