In the above, a voltage V is applied across the terminals P and Q. The voltage across the 1 ohm resistor is
-
A.
V/8 -
B.
V/4 -
C.
V/3 -
D.
V/2
Correct Answer: Option C
Explanation
Using the voltage- divider method which states that the output voltage is directly proportional to the input voltage and the ratio of R1 and R2, given by:
(V_{a}) = (frac{R_{a}}{R_{T}}times V_{T})
(R_{T}) = (1 + frac{4times4}{4+4})
⇒ (R_{T}) = (3Omega)
(V_{1}) = (frac{1}{3}V)