Awhining sound coming from the power supply after attempting to power up a system is a typical sound that occurs when a power supply is adjusting to temperature changes, and should be considered normal. a) true b) false

false

Explanation:

a PC needs to give a silent noise or better still no noise when it is being powered. It could be a problem within the coil in the power supply unit or a graphics card and the noise changes volume when a certain task is performed on it.

The two main causes of whinning noise in a computers are capacitors squealing and coil whinning.

answer; i believe that technician a is correct;

given the options, i would say your best bet is c. the modem supports up to 56 kbps, which is too low for video streaming. dial up modems use actual phone lines, which only can go up to 56 kbps as that's more than sufficient for traditional phone calls. this is also the reason why when a dial-up modem connects, you hear all those sounds. it's literally using the phone line to establish a connection.