Two similar cells are used to light two similar lamps as illustrated in the diagrams...
PHYSICSWAEC 2012
Two similar cells are used to light two similar lamps as illustrated in the diagrams below. In which of the circuit diagrams are the lamps brightest?
- A. P
- B. Q
- C. R
- D. S
Correct Answer: B. Q
Explanation
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.
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