Problem 19.57 The batteries shown in the circuit in the figure (Figure 1) have n

Question

Problem 19.57 The batteries shown in the circuit in the figure (Figure 1) have negligibly small internal resistances. Assume that E = 10.5V and R = 21.5 ohm. Part A Find the current through the 30.0 ohm resistor. Part B Find the current through the 21.5 ohm resistor. Part C Find the current through the 10.5V battery. Problem 19.57 The batteries shown in the circuit in the figure (Figure 1) have negligibly small internal resistances. Assume that E =10.5V and R=21.5 ohm. Part B Find the current through the 21.5 ohm resistor. Part C Find the current through the 10.5V battery.

Explanation / Answer

A) current through 30 ohms = V / R = 12.5 / 30 = 0.417 A = 417 mA

B) current through 21.5 ohms = V / R = ( 12.5- 5 ) / 21.5 = 0.348 A = 348 mA

C) current through 10.5 V battery = ( i of 30 ohms ) + ( i of 21.5 ohms) = ( 417 + 348)mA = 765 mA

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