HSC Physics Multiple-Choice Quiz

Try 4 original practice questions. Choose an answer for each question to see your score and the explanations.

1. A body moves at constant speed around a circle. In what direction is the net force? Along the direction of motion Towards the centre of the circle Away from the centre Opposite the direction of motion

2. An ideal transformer has 200 primary turns and 50 secondary turns. If the primary voltage is 12 V AC, what is the secondary voltage? 2 V 48 V 3 V 0.75 V

3. A radioactive sample has a half-life of four hours. What fraction of the original nuclei remain after 12 hours? 1/8 1/3 1/2 1/4

4. For a fixed metal with incident light above the threshold frequency, what increases the maximum kinetic energy of emitted photoelectrons? Increasing the light frequency Increasing intensity at the same frequency Increasing exposure time Increasing the illuminated area

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