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In the following figure, the electric field on y-axis will be maximum at y=

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Important Questions on Electric Charges and Fields

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Gamma Question Bank for Engineering Physics>Chapter 15 - Electric Charges and Fields>EXERCISE 1.2>Q 12

Figure shows charge beads with charges as shown in figure. The charges are placed upon the corners of a square. Rank the magnitude of electric field at the centre in decreasing order.

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Gamma Question Bank for Engineering Physics>Chapter 15 - Electric Charges and Fields>EXERCISE 1.3>Q 13
A wire is bent in the form of a regular pentagon of edge length a. A total of charge q is distributed over it. Find the electric field at the centre of the pentagon.
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Gamma Question Bank for Engineering Physics>Chapter 15 - Electric Charges and Fields>EXERCISE 1.3>Q 14
A point charge q is kept at the centre of a fixed semicircular thread having a uniform charge per unit length λ, the radius of the semicircular thread being R. The force required to keep the charge stationary is
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Gamma Question Bank for Engineering Physics>Chapter 15 - Electric Charges and Fields>EXERCISE 1.3>Q 15
In which of the following figures, the direction of electric field at point P is different from others? (λ and -λ represent constant linear charge densities)
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Gamma Question Bank for Engineering Physics>Chapter 15 - Electric Charges and Fields>EXERCISE 1.3>Q 16
A circular ring carries a charge Q, the variation of electric field with distance x measured from centre along axis for x<<R can be given as [R→ Radius of Ring]
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Gamma Question Bank for Engineering Physics>Chapter 15 - Electric Charges and Fields>EXERCISE 1.3>Q 17
A circular ring carries a charge Q, the variation of electric field with distance x measured from centre along axis for x<<R is given by E=kQxR3 [R→ Radius of Ring]. The maximum electric field on the axis will be [where C=Q4πε0R2 ]
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Gamma Question Bank for Engineering Physics>Chapter 15 - Electric Charges and Fields>EXERCISE 1.4>Q 18
A region of space contains a constant electric field of magnitude, 1325 N C-1. A wire frame forming a square, 0.27 m on a side, is placed in the region, oriented so that the perpendicular to the plane of the square makes an angle of 48° with the field. What is the magnitude of the electric flux through the frame?
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Gamma Question Bank for Engineering Physics>Chapter 15 - Electric Charges and Fields>EXERCISE 1.4>Q 19

A charge q is placed just above the centre of a horizontal circle of radius r, and a hemisphere of this radius is erected about the charge. Compute the electric flux through the closed surface that consists of the hemisphere and the planar circle. Do not use Gauss' law.

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