Question 32
Question 32 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...
4.5.3. Magnetic effect of a current

Describe how the magnetic effect of a current is used in relays and loudspeakers and give examples of their application

4. Electricity and magnet...
4.5.4. Force on a current-carrying...

Describe an experiment to show that a force acts on a current-carrying conductor in a magnetic field, including the effect of reversing: (a) the current (b) the direction of the field