1.15 APPLICATIONS OF GAUSS’S LAW

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1. Electric field due to an infinite charged sheet

1 point

varies in direct proportionality with r

varies as 1/r

varies as 1/r^2

does not vary with r

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2. Electric field due to an infinite charged wire

1 point

varies in direct proportionality with r

varies as 1/r

varies as 1/r^2

does not vary with r

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3. Electric field due to a charged shell

1 point

is zero inside, varies proportional to r outside

is constant inside, varies as 1/r^2 outside

is zero inside, varies as 1/r^2 outside

is constant inside, varies proportional to r outside

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4. Two infinitely long parallel conducting plates having surface charge densities +σ and -σ respectively, are separated by a small distance. The medium between the plates is vacuum. If εo is the dielectric permittivity of vacuum, then the electric field in the region between the plates is

1 point

zero

σ/2εo

σ/εo

2σ/εo

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