Resistance and circuit components

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Question 27
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A student sets up circuit A with a single filament lamp connected to a 9 V d.c. power supply as shown in Figure A.

Figure A: Circuit diagram showing a 9V d.c. power supply connected in series with a single filament lamp.

The student then adds an identical second filament lamp in series to create circuit B, as shown in Figure B. The power supply voltage remains unchanged at 9 V.

Figure B: Circuit diagram showing a 9V d.c. power supply connected in series with two identical filament lamps.

State and explain how the brightness of a single lamp in circuit B compares to the brightness of the lamp in circuit A.

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Resistance and circuit components Questions

  1. GCSE
  2. /Physics
  3. /Resistance and circuit components