CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
343
You visited us 343 times! Enjoying our articles? Unlock Full Access!
Byju's Answer
Standard XII
Physics
Potential Energy of a System of Multiple Point Charges
A small uncha...
Question

A small uncharged metallic sphere is positioned exactly at a point midway between two equal and opposite point charges separated by very small distance. If the spheres is slightly displaced towards the positive charge and released, then-

A
It will oscillate about it's original position.
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
It will move further towards the positive charge.
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
Its potential energy will decrease and kinetic energy will increase.
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
The total energy remains constant but is non-zero.
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

The correct options are
B It will move further towards the positive charge.
C The total energy remains constant but is non-zero.
D Its potential energy will decrease and kinetic energy will increase.
The charges are induced in sphere as shown in above figure. Since distance between the negative induced charge and positive charge decreases, force increases and thus it keeps moving towards the positive charge.
Electric forces are conservative so total energy doesn't change, and since kinetic energy is increasing, potential energy must decrease.
119045_112177_ans.jpg

flag
Suggest Corrections
thumbs-up
0
similar_icon
Similar questions
Q. If points A and B have a potential 3V and 5V respectively, and a dipole is brought between the two points, which way will its dipole moment align?
Given: Dipole is an arrangement of two equal and opposite charges separated by a very small fixed distance and Dipole moment is a vector quantity which points from negative to the positive charge of the dipole arrangement.
Q. Two fixed, equal, positive charges, each of magnitude 5×10−5 C are located at point A and B separated by a distance 6 m. An equal and opposite charge moves towards them along the line COD, the perpendicular bisector of the line AB. The moving charge, when it reaches the point C at a distance of 4 m from O, has a kinetic energy of 4 joules. Calculate the distance of the farthest point D which the negative charge will reach before returning towards C.
1011213_9f50ec565da8417787ff2dead9edbe2c.png
Q. Two fixed, equal, positive charges, each of magnitude 5×10−5C are located at points A and B separated by a distance of 6 m. An equal and opposite charge moves towards them along the line COD, the perpendicular bisector of the line AB. The moving charge when it reaches the point C at a distance of 4 m from O, has a kinetic energy of 4 J. If the distance of the farthest point D which the negative charge will reach before returning towards C is x, then find the value of x2/12.
223750.jpg
Q. If points A and B have a potential 3V and 5V respectively, and a dipole is brought between the two points, which way will its dipole moment align?
Given: Dipole is an arrangement of two equal and opposite charges separated by a very small fixed distance and Dipole moment is a vector quantity which points from negative to the positive charge of the dipole arrangement.
Q. The lines of force of the electric field of a positive charge (+q) and a negative charge (−q) are shown in figure (a) and (b) below. Then:-

(a) The work done in moving a small positive charge (+q0) from Q to P will be positive
(b) The work done in moving a small negative charge (−q0) from B to A will be positive
(c) In going from Q to P, the kinetic energy of a small negative charge (−q0) increases
(d) In going from B to A, the kinetic energy of a small negative charge (−q0) decreases



View More
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Potential Energy of a System of Point Charges
PHYSICS
Watch in App
explore_more_icon
Explore more
Potential Energy of a System of Multiple Point Charges
Standard XII Physics
Join BYJU'S Learning Program
book_image
Solve
book_image
Textbooks
book_image
Question Papers
book_image
Install app
CrossIcon