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JEE PHYSICS MCQ: ELECTRIC FIELDS AND CHARGES
1
Medium
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Analyzing
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Two identical conducting spheres carrying different charges attract each other with a force when placed in air medium at a distance apart. The spheres are brought into contact and then taken to their original positions. Now the two spheres repel each other with a force whose magnitude is equal to that of the initial attractive force. The ratio between initial charges on the spheres is
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Correct option: C
Option A ( only) is incorrect. Option B ( only) is incorrect. Option D () is incorrect. Option C () is correct because it is derived from equating the magnitudes of the attractive and repulsive forces after the spheres are brought into contact.
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Reason:- At any point, there is only one direction of electric field. Statement-I: A positive point charge is brought in an electric field, the electric field at neary by point will increase
Statement-II: Electric field produced by charge may favour the existing electric filed Two particles having equal mass and charge
are separated by a distance The force(s) they
experience is (are) Statement-I: No 2 electric lines of force can intersect each other
Statement-II: tangent at any point of electric line of force gives the direction of electric field A force of is acting between two charges in air if the space between them is completely filled with glass , then the new force will be …… An electron is placed at centre of a conducting sphere of radius 0.2 metre having charge coulomb. The force of on the electron is ________ N