IT 150: Chapter 7

parallel circuit resistance - reciprocal method

1/RT = 1/R1 + 1/R2 + 1/R3... + 1/RN

Solve RT, IT, PT Given: 90V, R1 = 15 ohms, R2 = 6 ohms, R3 = 10 ohms

3 ohms 30 A 2700 W

what is the total resistance of a 12 ohm and an 8 ohm resistor connected in parallel

4.8 ohms

Solve for ER1, IR2 Given: 90V, R1 = 15 ohms, R2 = 6 ohms, R3 = 10 ohms

90V 15 A

parallel circuit voltage

ET = E1 = E2 = E3...=EN

parallel circuit current

IT = I1 + I2 + I3...+IN

power in a parallel circuit

PT = P1 + P2 + P3...+ PN

equal resistance method

RT = R/N

parallel circuit resistance - product over sum

RT = R1 x R2/ R1 + R2

checking voltage drops is ______ method of troubleshooting a parallel circuit

an impractical

individual currents

branch currents

kirchoff's current law

current in = current out

total voltage

equal to any individual voltage drop

voltage in parallel

equal to source voltage

total currents

mainline current

parallel circuit resistance

total resistance of parallel circuit is always less than the smaller resistance