What should the temperature of a typical soldering iron be when joining two wires together?
Answer(s): C
To properly melt solder, you should use a soldering iron heated between 500 and 600 degrees Fahrenheit.
What is the voltage across the load R and the current through R when the switch is open in the following circuit?
Answer(s): D
When the switch is open, no current flows. The voltage VR is I times R, which equals 0(5) = 0.
Which of the following is NOT needed to produce electrical power from fossil fuels?
Answer(s): A
Dams are used to produce power from water.
An AA battery produces a potential difference of 1.5V. Four AA batteries are placed in series to power a portable FM radio.What is the total voltage of the radio?
Voltages in series are added to determine the total voltage.1.5V + 1.5V + 1.5V + 1.5V = 6.0V.
Two 8-ohm speakers are connected in parallel to an amplifier with a 24-volt output.What is the voltage across each speaker?
Resistances in parallel have the same voltage across them.
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