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...
4.1. Simple phenomena of magnetism

State the differences between the properties of temporary magnets (made of soft iron) and the properties of permanent magnets (made of steel)

4. Electricity and magnet...
4.5.6. The transformer

Explain the principle of operation of a simple iron-cored transformer