Two similar cells are used to light two similar lamps as illustrated in the diagrams above. In which of the circuit diagrams are the lamps brightest?
Attached Figure / Diagram
A
P
B
Q
C
R
D
S
Verified Correct Answer: B.
Physical Principles & Numerical Solution
The determinant of the brightness of a bulb is the power (watts) of the circuit.
Recall that Power (P) = \(\frac{V^2}{R}\).
Since the resistance is to be used as a divisor, it means the smaller the resistance, the greater the power.
Source: Myschool Past Questions Archive (Record #35619)