answer each question correctly to get a 5 star rating. show your work also 1.) T

Question

answer each question correctly to get a 5 star rating. show your work also

1.) The drawing shows a circuit that contains a battery, two resistors, and a switch. Consider the circuit with R1 = 58.5, R2 = 98.1, and V = 8.1.

(a) What is the equivalent resistance of the circuit when the switch is open and closed?

(b) What is the total power delivered to the resistors when the switch is open and closed?

= W

2.) Determine the equivalent resistance between the points A and B for the group of resistors in the drawing. Use

R1 = 6 ?, R2 = 5 ?, and R3 = 6 ?.
Req = ?

Explanation / Answer

1.)

a.) When switch is open, Ropen = R1 = 58.5 ohms

When switch is closed, Rclosed = (R1*R2)/(R1+R2) = 36.65 ohms

b.) When switch is open, Popen = V^2/Ropen = V^2/R1 = 8.1^2/58.5 = 1.121 W

When switch is closed, Pclosed = V^2/Rclosed = V^2/R1 = 8.1^2/36.65 = 1.79 W

2.) A || B = A*B/(A+B)

Req = (20 ohms) || (R1 + ((R2+6) || (R3 || 9)))

So substituting, values of R1, R2, R3, we get

Req = 795/131 = 6.0687 ohms

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

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