DP Physics (last assessment 2024)

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Question 22M.1.HL.TZ1.35

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Date May 2022 Marks available [Maximum mark: 1] Reference code 22M.1.HL.TZ1.35
Level HL Paper 1 Time zone TZ1
Command term Question number 35 Adapted from N/A
35.
[Maximum mark: 1]
22M.1.HL.TZ1.35

A direct current I in a lamp dissipates power P. What root mean square (rms) value of an alternating current dissipates average power P through the same lamp?

A.  I2

B.  I2

C.  I

D.  I2

[1]

Markscheme

C

Examiners report

This question was very challenging for HL candidates, with the lowest difficulty index on the paper. Option B was a very effective distractor; perhaps candidates were selecting their answer based on a connection between rms values and 2-1.

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