Electronics Flashcards
What does the abbreviation DC stand for?
Direct current
Which of the following has the least resistance?
A. Iron
B. Rubber.
C. Copper.
D. Wood
C. Copper.
What increases or decreases the voltage in a system without the need for an electrical connection?
Transformer
A device used to amplify a signal is called a?
Transistor
What process changes incoming alternating current (AC) To direct current (DC)?
Rectification
The amount of electrical power is measured in units called?
Watts
What does an arrow over the resistor symbol represent?
A variable
Components designed to store electrical charge are called?
Capacitors
In what direction does current go in electron flow notation?
From negative to positive
In an electronic circuit diagram, the symbol used to show wires connecting is a?
Dot
What occurs when a wire is wrapped around an iron core and a current Is sent through the wire?
Magnetic effect
What is the term for a magnetic effect that are perpendicular to the conductor and parallel to each other?
Lines of force
What is commonly used in a circuit in which the flow of electricity needs to be regulated for the device to run properly?
Resistance
What color wire from the following choices is not considered a hot wire?
A. Red.
B. Black.
C. Gray.
D. Blue.
C. Gray.
Ohms law states?
Voltage = current x resistance.
A resistors’s first three color bands are brown, black, and red. What is its value?
1000 ohms
In the US, all metal equipment, electrical or not, connect to a swimming pool must be?
Bonded together
Voltage can also be expressed as?
Electrical potential difference
Newer cell phones contain a removable memory card, which is often called a?
Sim card
Made from a Variety of materials, such as carbon, this inhabits to flow of current?
Resistor
- Because it resists or inhabit the flow of current
This is a type of semiconductor that only allows current to flow in 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 a AC and DC stand for in the electrical field?
Alternating current and direct current
Changing AC to DC is called what?
Rectification
A 5000 BTU air conditioner can efficiently cool up to 150 ft.² or a 10-foot-x-15-foot room. What does BTU stand for?
British thermal unit
Definition of current?
The presence of electron flow
A device that transforms energy from one form to another is called?
Transducer
Which one of the following is an active element?
A. 15 K resistors.
B. 10 mH Inductor
C. 25 pF Capacitor
D. 10 V power supply
D. 10 V power supply.
A lightbulb is 60 Watts. Operated at 120 V, how much current does it draw?
0.5 amperes
A number 12 wire, compared to a number 6 wire Is?
A. Is longer
B. Is shorter
C. Is smaller in diameter
D. Is larger in diameter
C. Is smaller in diameter
A fuse with a higher- than-required rating used in an electrical circuit?
A. Improved safety.
Be. Increases maintenance.
C. May not work properly.
D. Is less expensive.
C. May not work properly
Neutral wire is always
Whitish or natural
To measure electrical power you would use a?
Wattmeter
