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KCET 2020 Physics Solved Paper

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Question : 42

Total: 60

The electric field lines on the left have twice the separation on those on the right as shown in figure. If the magnitude of the field at A is 40 𝑉𝑚‌−1, what is the force on 20 𝜇𝐶 charge kept at B?

1×10−4Vm−1
4×10−4Vm−1
8×10−4Vm−1
16×10−4Vm−1

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