Question 25
Question 25 of 40
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No letter options?
Older MCQs might not have the typical A, B, C, D choices. They have choices 1, 2, 3, and a combination of them is the answer. Below is the key that maps such combinations to the answer.
A 1, 2 and 3 are correct
B 1 and 2 only are correct
C 2 and 3 only are correct
D 1 only is correct
Topics Tested
4. Electricity and magnet...
4.2.3. Electromotive force and pote...

Define potential difference (p.d.) as the work done by a unit charge passing through a component

4. Electricity and magnet...
4.2.2. Electric current

Know the difference between direct current (d.c.) and alternating current (a.c.)