Home
Class 12
PHYSICS
Two charges of magnitude 5 nC and -2 nC ...

Two charges of magnitude `5 nC and -2 nC` are placed at points (2cm,0,0) and (x cm,0,0) in a region of space. Where there is no other external field. If the electrostatic potential energy of the system is `-0.5 muJ`. What is the value of x ?

A

20 cm

B

80 cm

C

4 cm

D

16 cm

Text Solution

Verified by Experts

The correct Answer is:
A
Potential energy of system `U=1/(4piepsilon_0)(q_1q_2)/r`
`=0.5xx10^(-6)=(9xx10^(9)xx5xx10^(-9)xx(-2)xx10^(-9))/((x-2)xx10^(-2))`
`rArr` x =20 cm
Promotional Banner

Topper's Solved these Questions

  • ELECTROSTATIC POTENTIAL AND CAPACITANCE

    NCERT FINGERTIPS|Exercise Potential Energy In An External Field|4 Videos

  • ELECTROSTATIC POTENTIAL AND CAPACITANCE

    NCERT FINGERTIPS|Exercise Electrostatics Of Conductors|5 Videos

  • ELECTROSTATIC POTENTIAL AND CAPACITANCE

    NCERT FINGERTIPS|Exercise Equipotential Surfaces|9 Videos

  • ELECTROMAGNETIC WAVES

    NCERT FINGERTIPS|Exercise Assertion And Reason|15 Videos

  • MAGNETISM AND MATTER

    NCERT FINGERTIPS|Exercise Assertion And Reason|15 Videos

Similar Questions

Explore conceptually related problems

Two charges of +5nC and -2nC are placed at points (5cm, 0, 0) and (23cm, 0, 0) in a region of space where there is no other external electric field. Calculate potential energy of this charge system.

Two point charges of magnitude +q and -q are placed at (-d//2,0,0) and (d//2,0,0) are respectively. Find the equation of the euipotential surface where the potential is zero.

Two point charges of magnitude 4 mu C and-4 mu C are kept at points (-2 cm, 0) and (2 cm, 0) respectively. Calculate the magnitude of electric field intensity at points (0, 2 cm).

Two identical charges of -0.1 muC are palced at point A (0, 0) and B (8cm, 0) respectively. Calculate the value of charge Q to be placed at a point M (4 cm, 0) such that the electrostatic potential energy of the system is zero.

Two point charges 0.1 mC and 0.05 mC are kept at points (2m, 0, 0) and (-2m, 0, 0) respectively. Calculate the electrostatic potential energy of the system in absence of any external electric field.

Two point charges of +Q each have been placed at the positions (–a//2, 0, 0) and (a//2, 0, 0) . The locus of the points in YZ plane where –Q charge can be placed such the that total electrostatic potential energy of the system can become equal to zero, is represented by which of the following equations ?

Two charges q_(1) and q_(2) are placed at (0,0,d) and (0,0,-d) respectively. Find locus of points where the potential is zero.

Three point charges 3nC, 6nC and 6nC are placed at the corners of an equilateral triangle of side 0.1 m. The potential energy of the system is

Two point charges 8 muC and -8muC are kept at points (-2cm, 0) and (2cm, 0), respectively. Calculate the electric potential at points (0, 7cm) and (4cm, 0).