FIGURE 21-12
-Three resistors of values 2 Ω, 6 Ω and 12 Ω are connected across a DC voltage source as shown in Figure 21-12. 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 21-12 
-Three resistors of values 2 Ω, 6 Ω and 12 Ω are connected across a DC voltage source as shown in Figure 21-12. 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 gives 0.6 A.

FIGURE 21-12 -Three Resistors of Values 2 Ω, 6 Ω and 12