DP Physics (first assessment 2025)

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Question 19M.1A.SL.TZ1.17

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Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.1A.SL.TZ1.17
Level SL Paper 1A Time zone TZ1
Command term Question number 17 Adapted from N/A
17.
[Maximum mark: 1]
19M.1A.SL.TZ1.17

A resistor of resistance R is connected to a fully charged cell of negligible internal resistance. A constant power P is dissipated in the resistor and the cell discharges in time t. An identical cell is connected in series with two identical resistors each of resistance R.

What is the power dissipated in each resistor and the time taken to discharge the cell?

[1]

Markscheme

B

Examiners report

This question was not well answered, with fewer than 25 % of candidates correctly selecting response B. Furthermore, the discrimination index for this question was remarkably low, suggesting this question would provide rich classroom discussion.

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