FIGURE 26-19
-Three resistors of values 2 Ω, 6 Ω and 12 Ω are connected across a DC voltage source as shown in Fig. 26-19. If the total current through the circuit is I = 5.0 A, what is the current through the 12 Ω resistor?
A)0.5 A
B)0.6 A
C)0.7 A
D)0.8 A
E)0.9 A

Question

FIGURE 26-19 
-Three resistors of values 2 Ω, 6 Ω and 12 Ω are connected across a DC voltage source as shown in Fig. 26-19. If the total current through the circuit is I = 5.0 A, what is the current through the 12 Ω resistor?
A)0.5 A 
B)0.6 A 
C)0.7 A 
D)0.8 A 
E)0.9 A

Quizplus · Accepted Answer

The resistors are in parallel, so the voltage across each resistor is the same. Using Ohm's law (V = IR), the current through the 12 Ω resistor is I = V/12. The total current is the sum of the currents through each resistor. Solving for the current through the 12 Ω resistor using the total current and the parallel resistor formula gives 0.6 A.

FIGURE 26-19 -Three Resistors of Values 2 Ω, 6 Ω and 12