DP Physics (first assessment 2025)

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Question 23M.1A.SL.TZ1.12

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Date May 2023 Marks available [Maximum mark: 1] Reference code 23M.1A.SL.TZ1.12
Level SL Paper 1A Time zone TZ1
Command term Question number 12 Adapted from N/A
12.
[Maximum mark: 1]
23M.1A.SL.TZ1.12

A solid is heated at constant power in an insulated container. The graph shows the variation of temperature with time.

 

Why is the temperature constant for section QR?


A.  The intermolecular potential energy of the molecules is constant.

B.  The kinetic energy of the molecules is constant.

C.  The internal energy of the solid is constant.

D.  The rate at which the solid absorbs heat is equal to the rate at which it loses heat.

[1]

Markscheme

B

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