Top 10 electronics factsElectronics quiz
What material is computer's processor made of?
Single crystal silicon is used in the fabrication of semiconductors. On the quantum scale that microprocessors operate on, the presence of grain boundaries would have a significant impact on the functionality of field effect transistors by altering local electrical properties. Therefore, microprocessor fabricators have invested heavily in facilities to produce large single crystals of silicon.
Which type of transmission uses the shortest waves?
Satellite TV. The Ku band is the portion of the electromagnetic spectrum in the microwave range of frequencies from 12 to 18 gigahertz (GHz). Ku band is primarily used for satellite communications, most notably for fixed and broadcast services, and for specific applications such as NASA's Tracking Data Relay Satellite used for both space shuttle and International Space Station
What kind of electromagnetic waves does the typical tv remote use?
Infrared radiation. Early television remote controls used ultrasonic tones. Present-day remote controls are commonly consumer infrared devices which send digitally-coded pulses of infrared radiation to control functions such as power, volume, channels, etc.
What technique are these parking sensors using?
Echo sounding. Typical parking sensors are ultrasonic, often a clicking sound may be heard close by. There are also less popular electromagnetic sensors, that do not require any holes in the bumper, but detect metal objects only.
What may happen to a lead battery when overcharged?
Explosion. Any lead-acid battery system when overcharged will produce hydrogen gas by electrolysis of water. If the rate of overcharge is small, the vents of each cell allow the dissipation of the gas. A severe overcharge may produce a flammable concentration of hydrogen.
What does HTC stand for in the HTC Corporation name?
High Tech Computer. HTC was founded in 1997 as a manufacturer of notebook computers. The company changed name to HTC and doesn't use "High Tech Computer" name any more. However, some HTC smartphones are still visible as "High Tech Computer" devices when plugged into a PC.
Which device converts an acoustic wave into an electrical signal?
Microphone. A microphone, colloquially nicknamed mic or mike is a transducer that converts sound into an electrical signal. Microphones typically need to be connected to a preamplifier before the signal can be recorded or reproduced.
Which device converts electricity into acoustic energy?
Headphones are a pair of small loudspeaker drivers worn on or around the head over a user's ears. They are electroacoustic transducers, which convert an electrical signal to a corresponding sound.