how much do u expect in exam?

around 240

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how much do u expect in exam?

around 240

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explantion:

as it varies linearly take

∈r=(kx+∈1)

as at x=0 ∈r=∈1

so at d

∈2=kd+∈1

k=(∈2-∈1)/d

Now find the potential difference and find the capacitance on ur own

the answer is 1)