Given the circuit shown below, the power supply is set to a voltage V=17.7 V, R2

Question

Given the circuit shown below, the power supply is set to a voltage V=17.7 V, R2 = 38.6 ?, and R3 = 55.4 ?. res_1_p2.gif Suppose you place an ammeter into the circuit and find that the current through R2 is 0.239 A. Answer the following questions:

What is the voltage across resistor R2? 9.22 V You are correct. Your receipt no. is 161-705 Help: Receipt Previous Tries

What is the current through resistor R3? 0.167 A You are correct. Your receipt no. is 161-685 Help: Receipt Previous Tries

What is the current flowing through R1? Submit Answer Tries 0/10

What is the resistance of resistor R1?

I need the two bolded ones answered please

Explanation / Answer

V = 17.7 V
R2 = 38.6 ohm
R3 = 55.4 ohm
a) What is the voltage across resistor R2?

Current in R2, I= 0.239 A

the voltage across V will be I*R = 38.6*0.239 = 9.22 V

b) What is the current through resistor R3?

Current through R3, I3 = V/R3 = 9.22/55.4=0.167 A

c) Current through R1, I1 = I2+I3 = 0.239+0.167 = 0.406 A

d) Voltage across R1,V1= 17.7 - 9.22 = 8.48 V

So the resistance R1 = V1/I1 = 8.48/0.406 = 20.887 ohm.

Related Questions

Navigate

• Browse (All)
• Browse G
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.