Question

Current through the $25 \,\ \omega$ resistor as shown in figure is

• A. 1 A
• B. 2 A
• C. 2.5 A
• D. Zero

Answer 1

Answer: (D)

$R_{\text {net }}=\frac{(15)(30)}{45}=10 \,\Omega$
Current through $25\, \Omega$ resistance is zero in balanced wheatstone Bridge.