For the circuit in the figure (Figure 1) . Assume that R 1= 1.5? and R 2 = 5.8?
ID: 2288987 • Letter: F
Question
For the circuit in the figure (Figure 1) . Assume that R1= 1.5? and R2 = 5.8? .
A.
Find the rate of conversion of internal (chemical) energy to electrical energy within the battery.
Express your answer using two significant figures.
P=____W
B.
Find the rate of dissipation of electrical energy in the battery.
Express your answer using two significant figures.
P1=_____W
C.
Find the rate of dissipation of electrical energy in the external resistor.
Express your answer using two significant figures.
P2= ____W
Explanation / Answer
equivalent resistance
Req=R1+R2=1.5+5.8=7.3 ohms
Current flowing in the circuit
I=V/Req=12/7.3=1.644 A
Power
P=VI=12*1.644
P=19.73 Watts
b)
Energy dissipated in battery is
Pbat=I2R1=1.6442*1.5
Pbat=4.05 Watts
c)
Energy dissipated in external resistor is
PRes=I2R2=1.6442*5.8
PRes=15.67 Watts