Two point charges each of +1μC are at a distance of 3 m apart. The w

Question

Two point charges each of +1

μ

C are at a distance of 3 m apart. The work done in bringing the two charges closer to a distance 1 m apart is

Options:

A . 0.006 J

B . 0.008 J

C . 0.0006 J

D . 0.06 J

Answer: Option A
:
A

W = U_{2} - U_{1} = \frac{1}{4 π ϵ_{0}} q_{1} q_{2} [\frac{1}{r_{2}} - \frac{1}{r_{1}}] = 9 \times 10^{9} \times 10^{- 12} [\frac{1}{1} - \frac{1}{3}] = 9 \times \frac{2}{3} \times 10^{- 3} W = 0.006 J

Was this answer helpful ?

Next Question

More Questions on This Topic :

Question 1. Two Charges Q1 and Q2 are as shown in the figure. A third charge Q3 is moved from points A to B along a circular pat....circular path. Change in potential energy of the system is

Question 2. If an electron starts from rest from a point at which potential is 50 volt to another point at which potential is 70 vol....then its kinetic energy in the final state will be

Question 3. Three particles, each of charge 10 μC are placed at the corners of an equilateral triangle of side 10 cm. The....10 cm. The electrostatic potential energy of the system is Given (14πϵ=9×109 N−m2/C2)

Question 4. A point charge q is placed inside a conducting spherical shell of inner radius 2R and outer radius 3R at a distance of R....potential at the centre of shell will be 14πϵ0 times:

Question 5. An electron (charge = 1.6×10−19 coulomb) is accelerated through a potential of 1,00,000 volts. The ene....of 1,00,000 volts. The energy required by the electron is

Question 6. Three charges each of charge ‘q’ are placed at the corners of an equilateral triangle. The fourth ch....that electrostatic potential energy of the system is zero is

Question 7. Two charges q1 and q2 are placed 30 cm apart as shown in the figure. A third charge q3is moved along the arc of a circle....potential energy of the system is q34πϵ0k, where k is

Question 8. Charges of +103×10−9C are placed at each of the four corners of a square of side 8 cm. The potential at the intersec....cm. The potential at the intersection of the diagonals is

Question 9. A positively charged conductor ....

Question 10. An infinite number of charges of equal magnitude q, but of opposite sign are placed alternately starting with positive c....charges will be (in S.I units and k = 14πϵ0

Chapter 1 - GLOBAL STEEL SCENARIO & INDIAN STEEL INDUSTRY Part 1 : (13-04-2024) INDUSTRY AND COMPANY AWARENESS (ICA)

Direction Sense Test Part 1 Reasoning (Hindi)

Chapter 1 - RMHP / OHP / OB & BP Part 1 : (14-02-2024) GPOE

Cube & Cuboid Part 1 Reasoning (Hindi)

Data Interpretation (DI) Basic Concept Reasoning (Hindi)

Counting Figures Part 1 Counting Of Straight Lines Reasoning (Hindi)

Sail E0 free webinar Webinars

Real Numbers Part 7 Class 10 Maths

Real Numbers Part 1 Class 10 Maths

Polynomials Part 1 Class 10 Maths

DSP Combined 1 Free Revision Test SAIL JO E-0

GPOE / GPA Combined 1 Free Revision Test SAIL JO E-0

BSP Plant Specific Review Test SAIL JO E-0

BSL Combined 1 Free Revision Test SAIL JO E-0

GFM Combined 1 Free Revision Test SAIL JO E-0