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WBJEE 2021 Physics and Chemistry Solved Paper

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PHYSICS

CATEGORY - I (Q1 to Q30)

Carry 1 mark each and only one option is correct. In case of incorrect answer or any combination of more than one answer, ¼ mark will be deducted.

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Question : 21 of 80

Marks: +1, -0

Three infinite plane sheets carrying uniform charge densities −σ,2σ,4σ are placed parallel to XZ plane at Y=a,3a, 4a respectively. The electric field at the point (0,2a,0) is

5σ
2ε0
^
j
−
7σ
2ε0
^
j
σ
2ε0
^
j
5σ
−2ε0
^
j

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