The drawing shows a circuit that contains a battery, two resistors, and a switch

Question

The drawing shows a circuit that contains a battery, two resistors, and a switch. What is the equivalent resistance of the circuit when the switch is (a) open and (b) closed? What is the total power delivered to the resistors when the switch is (c) open and (d) closed?

The drawing shows a circuit that contains a battery, two resistors, and a switch. What is the equivalent resistance of the circuit when the switch is (a) open and (b) closed? What is the total power delivered to the resistors when the switch is (c) open and (d) closed?

Explanation / Answer

a)

R=R1 =65 ohms

b)

R=R1R2/R1+R2 =65*96/65+96

R=38.76 ohms

c)

P=V^2/R =9^2/65 =1.246 W

d)

P=9^2/38.76

P=2.09 W

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