PICAT: Electronics Information
Which is a variable resistor with three terminals and a contact that can slide?
Potentionmeter
In the equation P=I*V, what does P stand for?
Power (watts)
What is the frequency of the alternating voltage and current typically used in the United States?
60 hz
If a cubic yard of sand weighs 1.5 (US) tons, how many 11x6x7 inch ammo boxes can be completely filled with 1 ton of sand?
67
An oscilloscope is typically used to analyze?
Complex waveforms
What is diode?
Component that allows current flow in one direction only
Most 12 V car battery are made up of six individual cells connected in series. What is the voltage of each cell in a car battery?
2 V
Two 8-ohm speakers are connected in parallel to an amplifier with a 24-volt output. What is the voltage across each speaker?
24 volts
How many amps are in 3,500 milliamps?
3.5
Printed circuit boards are typically made out of?
Fiberglass
What should the temperature of a typical soldering iron be when joining two wires together?
500 to 600 fahrenheit
An AA battery produces a potential difference of 1.5 V. Four AA batteries are placed in series to power a portable FM radio. What is the total voltage of the radio?
6.0
Which is an example of a parallel circuit?
A Christmas tree with two lights out
Which electronic component can store charge?
A capacitor
Which of the following is not needed to produce electrical power fro fossil fuels?
A dam
What is a rheostat?
A device used to vary the resistance in an electrical current
What does the resistor code yellow indicate?
A resistance value of 4
What is the resistor code color for a resistance of 6?
Blue
Most wires are made from?
Copper
What does the I stand for in P=I*V?
Current
The ammeter measures what aspect of an electrical circuit?
Electrical current
An ohmmeter is used to measure what?
Electrical resistance
When using a digital multi-meter to measure the amps in a circuit, the leads should be connected?
In series between the power source and load
Some of the advantages of optical data transfer versus wireline data transfer are: Choose all
Increased resistance to tampering/reduced possibility of unwanted interference from electromagnetic sources
Which function does the receiving antenna provide in radio communication?
It catches the signal out of the air
What position is a push-to-break button usually in?
On
What is measured in ohms?
Resistance
A properly soldered connection will appear?
Shiny
What makes a series-parallel circuit different from a parallel circuit?
Some loads are parallel and some are in series
What does a capacitor do?
Stores potential energy
The two most commonly used metals in solder are _ and _?
Tin and lead
The primary purpose of a hard drive in a computer is:
To provide non-volatile data storage for the system
When wiring 110V/120V AC power, what is the standard accepted color of the neutral wire?
White
What makes a resistor variable?
You can use it to change the amount of resistance in a circuit
What is the correct abbreviation for kilowatt-hour?
kWh
