Electronics Flashcards
Ohm’s law states
Voltage = Current × Resistance
A resistor’s first three color bands are brown, black, and red. What is its value?
1,000 ohms
In the U.S., all metal equipment, electrical or not, connected to a swimming pool must be
bonded together
Voltage can also be expressed as
electrical potential difference
Newer cellphones contain a removable memory card, which is often called a/an
SIM card
Made from a variety of materials, such as carbon, this inhibits the flow of current
resistor
This is a type of semiconductor that allows current to flow in only one direction. It is usually used to rectify AC signals (conversion to DC)
diode
Radar can operate at frequencies as high as
100,000 MHz
What do AC and DC stand for in the electrical field?
alternating current and direct current
Changing AC to DC is called what?
rectification
A 5,000 BTU air conditioner can efficiently cool up to 150 square feet, or a 10-foot x 15-foot room. What does BTU stand for?
British thermal unit
Which is the most correct definition of current
the presence of electron flow
A device that transforms energy from one form to another is called
a transducer
Which one of the following is an active element?
10 V power supply
A light bulb is 60 watts. Operated at 120 volts, how much current does it draw?
0.5 ampere
