Determine The Relationship Of Voltage, Current, And Resistance In Electrical Circuits. Flashcards
What three things must an electric circuit contain?
A source of electrical energy, a load to use the energy, and conductors to join the source and the load.
What are three types of DC circuits with regard to the placement of various circuit components?
Series, parallel, and series-parallel.
What is the name of the law that describes the relationship in an electrical circuit of voltage, current, and resistance?
Ohm’s law.
What is the basic equation of Ohm’s law?
E=I*R
What formula is used to find current when voltage and resistance are known?
I=E/R
What formula is used to find resistance when voltage and current are known?
R=E/I
What happens to the current in a DC circuit if the voltage is increased but the resistance remains the same?
It increases.
What happens to the current in a conductor if the length of the conductor is doubled with all other parameters unchanged?
It would decrease to one half.
What is the voltage across each resistor connected in parallel across a 12-volt battery?
12 volts.
How much current flows through each of three resistors connected in series if the total current is 3 amps?
3 amps.
What is the total resistance of three 12-ohm resistors connected in series?
36 ohms.
What is the total resistance of three 12-ohm resistors connected in parallel?
4 ohms.
