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Question 17N.1.HL.TZ0.35

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Date November 2017 Marks available [Maximum mark: 1] Reference code 17N.1.HL.TZ0.35
Level HL Paper 1 Time zone TZ0
Command term Question number 35 Adapted from N/A
35.
[Maximum mark: 1]
17N.1.HL.TZ0.35

The ratio  number of primary turns number of secondary turns  for a transformer is 2.5.

The primary coil of the transformer draws a current of 0.25 A from a 200 V alternating current (ac) supply. The current in the secondary coil is 0.5 A. What is the efficiency of the transformer?

A. 20 %

B. 50 %

C. 80 %

D. 100 %

[1]

Markscheme

C

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