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Question 19M.1.HL.TZ2.28

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Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.1.HL.TZ2.28
Level HL Paper 1 Time zone TZ2
Command term Question number 28 Adapted from N/A
28.
[Maximum mark: 1]
19M.1.HL.TZ2.28

A transformer with 600 turns in the primary coil is used to change an alternating root mean square (rms) potential difference of 240 Vrms to 12 Vrms.

When connected to the secondary coil, a lamp labelled “120 W, 12 V” lights normally. The current in the primary coil is 0.60 A when the lamp is lit.

What are the number of secondary turns and the efficiency of the transformer?

[1]

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D

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