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Short answer·Standard multi-step (3/5)·Calculator allowed

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

An infinite non-conducting plane sheet has surface charge density 8.85×10−8 C m−28.85\times10^{-8}\text{ C m}^{-2}. Find the electric field on either side of the sheet. Take ε0=8.85×10−12 C2 N−1 m−2\varepsilon_0=8.85\times10^{-12}\text{ C}^2\text{ N}^{-1}\text{ m}^{-2}.
Total: 2 marks

(a) Find the field magnitude and direction. (2 marks)

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cbse-physics-12.u1.t1-3.saq.003

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