DP Physics (first assessment 2025)

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Question 21N.1A.SL.TZ0.20

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Date November 2021 Marks available [Maximum mark: 1] Reference code 21N.1A.SL.TZ0.20
Level SL Paper 1A Time zone TZ0
Command term Question number 20 Adapted from N/A
20.
[Maximum mark: 1]
21N.1A.SL.TZ0.20

An electric motor of efficiency 0.75 is connected to a power supply with an emf of 20 V and negligible internal resistance. The power output of the motor is 120 W. What is the average current drawn from the power supply?

 

A.  3.1 A

B.  4.5 A

C.  6.0 A

D.  8.0 A

[1]

Markscheme

D

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