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Energy, power and resistance

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Question 10

The current in an LED indicator is 5.0 mA. The potential difference across the LED is 9.0 V.

What is the energy transfer in the LED over a period of 4.0 hours4.0\text{ hours}4.0 hours?

A

0.18 J0.18\text{ J}0.18 J

B

11 J11\text{ J}11 J

C

650 J650\text{ J}650 J

D

6.5×105 J6.5 \times 10^5\text{ J}6.5×105 J

Markscheme

Energy, power and resistance Questions

  1. A Level
  2. /Physics
  3. /Energy, power and resistance

26 exam-style questions on OCR A A Level Physics Energy, power and resistance, covering Circuit symbols, E.m.f. and p.d, Resistance, Resistivity, and Power. Each one has a worked solution and a mark scheme showing where the marks go.

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