A 30-ohm resistor and a 60-ohm resistor are connected in parallel. The two resis

Question

A 30-ohm resistor and a 60-ohm resistor are connected in parallel. The two resistors are then connected in series with a 10-ohm resistor. The entire circuit is then placed across a potential difference of 120-volts.

(A) Calculate the total resistance of the circuit.

(B) Calculate the current flowing through the circuit.

(C) Calculate the voltage drop across the 10-ohm resistor.

(D) Calculate the voltage drop across the parallel portion of the circuit.

(E) Calculate the current flowing through the 60-ohm resistor.

(F) Calculate the current flowing through the 30-ohm resistor.

Explanation / Answer

A)total resistance=(30*60)/(30+60)+10=20+10=30 ohm

B) i=V/R=120/30=4 ampere

C) voltage across 10 ohm=i*10=4*10=40 V

D) voltage drop across parallel protion=120-40=80V

E) i=V/R=80/60=1.33 A

i across 30 ohm=80/30=2.66 A

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