Question

Seven equal resistances R are connected in a circuit with a DC supply V, as shown in the figure. What are the currents flowing through the arm AB (Resistor No. 1) and arm CD (Resistor No. 4), respectively?

• A. V/(3R),0
• B. V/(4R),V/(7R)
• C. V/(3R), V/(7R)
• D. V/(7R), 0

Answer 1

Answer: (A)

V/(3R),0

Answer 2

⇓

Q $\frac{R_{3}}{R_{2}} = \frac{R_{5}}{R_{6}}$

∴ Bridge is balance

∴ I_CD = 0

I_AB = $\frac{V}{R_{eq}} = \frac{V}{3R}$