A-LevelPhysicsD.C. circuitsMay/June 2012Paper 1 Q361 Mark
A light-dependent resistor (LDR) is connected in series with a resistor R and a battery. [Figure 36.1] The resistance of the LDR is equal to the resistance of R when no light falls on the LDR. When the light intensity falling on the LDR increases, which statement is correct?
AThe current in R decreases.
BThe current in the LDR decreases.
CThe p.d. across R decreases.
DThe p.d. across the LDR decreases.
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The correct answer is D. This question tests the candidate's understanding of d.c. circuits within the Physicssyllabus. The examiner's mark scheme requires...
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