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Short answer·Hard exam skill (4/5)·No calculator

Difficulty guide

The label describes the problem, not your ability.

1/5 - Foundational

Warm-up setup; checks one basic idea.

2/5 - Routine exam skill

Normal syllabus skill; usually one main rule or interpretation.

3/5 - Standard multi-step

Exam-style problem with multiple steps or a common trap.

4/5 - Hard exam skill

High-end exam problem; combines methods carefully.

5/5 - Challenge

Stretch problem beyond normal exam pressure.

Question

A gas undergoes a rectangular clockwise cycle on a P−VP-V diagram. The higher pressure is 4.0×105 Pa4.0\times10^5\text{ Pa}, the lower pressure is 1.0×105 Pa1.0\times10^5\text{ Pa}, and the volume changes between 0.010 m30.010\text{ m}^3 and 0.030 m30.030\text{ m}^3.
Total: 2 marks

(a) Find the area enclosed by the cycle. (1 mark)

(b) State the sign of work done by the gas. (1 mark)

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cbse-physics-11.u8.t8-3.saq.008

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