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The given figure gives electric lines of force due to two charges q1 and q2. What are the signs of the two charges?

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Important Questions on Electrostatics

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Alpha Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise - 1>Q 126
Three positive charges of equal value q are placed at the vertices of an equilateral triangle. The resulting lines of force should be sketched as in
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Alpha Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise - 1>Q 127

A cylinder on whose surfaces there is a vertical electric field of varying magnitude as shown. The electric field is uniform on the top surface as well as on the bottom surface therefore, this cylinder encloses

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Alpha Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise - 1>Q 128

A metallic solid sphere is placed in a uniform electric field. The lines of force follow the path(s) shown in figure as :

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Alpha Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise - 1>Q 129
A neutral spherical metallic object A is placed near a finite metal plate B carrying a positive charge. The electric force on the object will be
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Alpha Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise - 1>Q 130
A positive point charge q is brought near a neutral metal sphere.
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Alpha Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise - 1>Q 131
Three concentric conducting spherical shells carry charges as follows +4Q on the inner shell, -2Q on the middle shell and -5Q on the outer shell. The charge on the inner surface of the outer shell is
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Alpha Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise - 1>Q 132
A charge q is uniformly distributed over a large plastic plate. The electric field at a point P close to the centre and just above the surface of the plate is 50 V m-1. If the plastic plate is replaced by a copper plate of the same geometrical dimensions and carrying the same uniform charge q, the electric field at the point P will become:
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Alpha Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise - 1>Q 133

Figure shows a thick metallic sphere. If it is given a charge +Q, then electric field will be present in the region.

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