In the above, a voltage V is applied across the terminals P and Q. The voltage across the 1 ohm resistor is
Attached Figure / Diagram
A
V/8
B
V/4
C
V/3
D
V/2
Verified Correct Answer: C.
Physical Principles & Numerical Solution
Using the voltage- divider method, which states that the output voltage is directly proportional to the input voltage and the ratio of R\(_1\) and R\(_2\), given by:
\(V_{a}\) = \(\frac{R_{a}}{R_{T}}\times V_{T}\)
\(R_{T}\) = \(1 + \frac{4\times4}{4+4}\)
⇒ \(R_{T}\) = \(3\Omega\)
\(V_{1}\) = \(\frac{1}{3}V\)
Source: Myschool Past Questions Archive (Record #41664)