EASY
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Assertion: Electric field due to a charged long conducting sheet does not depend on position of point from sheet.

Reason: Charged conducting sheet have uniform linear charge density.

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Important Questions on Electric Charges and Fields

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CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 126
Assertion: The net force acting on charge q placed at the centre of the metallic shell will be zero.

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Reason: Electric field inside the shell due to all the charges present outside the metallic shell is always zero.
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CUET (UG)
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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 127
A hollow charged metal sphere has radius r. If the potential difference between its surface and a point at a distance 3r from the centre is V, then electric field intensity at a distance 3r is:
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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 128
A positive point charge is placed at P, in front of an earthed metal sheet S. Q and R are two points between P and S, as shown in the figure. If the electric field strength at Q and R are, respectively, EQ and ER and the potential at Q and R are, respectively, VQ and VR. Then,

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EASY
CUET (UG)
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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 129
For two infinitely charged parallel sheets, the electric field at P will be 

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EASY
CUET (UG)
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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 130
Charge +q on a small conducting sphere S1 is placed inside a large hollow metallic sphere S2 having a charge +Q as shown in the figure. The sphere S1 is then connected to S2 by a conducting wire. The charge on S1 will be

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EASY
CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 131
An infinite line charge produces a field of 9×104 NC-1 at a distance of 2 cm. the linear density is
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CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 132
Three infinitely long charge sheets are placed as shown in figure. The electric field at point P is

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EASY
CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 133
An infinite line charge produces a field of 7.182×108  N C-1at a distance of 2 cm. The linear charge density is