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IGCSE · 4 · multiple choice

Electricity and magnetism · Question 2

Electricity and magnetism · Original GioPhysics question with a detailed, mark-by-mark answer guide.

Demand
routine
Marks
1
Topics
1
Answer
Complete
multiple choice1 mark

A current of 250 mA flows in a lamp for 4.0 minutes. How much charge passes through the lamp?

  1. A

    1.0 C

  2. B

    60 C

  3. C

    1000 C

  4. D

    60 000 C

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Answer overviewCorrect answer: B — 60 C
01

Answer and reasoning

1 mark
How to approach it

Predict from the governing principle before looking for a matching option. Then reject alternatives by checking direction, units, limiting behaviour or the physical meaning of each statement.

  1. 1

    The correct choice is B: 60 C

  2. 2

    A converts the minutes but not the milliamps. C converts the milliamps but not the minutes. Both unit conversions have to be done, which is the point of the item.

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