Question 14
Question 14 of 40
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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...
4.5.6. The transformer

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

1. Motion, forces and ene...
1.5.1. Effects of forces

Describe, qualitatively, motion in a circular path due to a force perpendicular to the motion as: (a) speed increases if force increases, with mass and radius constant (b) radius decreases if force increases, with mass and speed constant (c) an increased mass requires an increased force to keep speed and radius constant (F = mv²/r is not required)

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)