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
