Home
Class 12
PHYSICS
Point charges of 10nC,20nCand10nC are k...

Point charges of 10nC,20nCand10nC are kept at the corners A,B C of a square ABCD of side 3m. Calculate the magnitude of the resultant electric intensity at D.

Text Solution

Verified by Experts


Electric intensity , `E=(1)/(4piepsilon_(0))(q)/(d^(2))`
Here `E_(A)=E_(C)=9xx10^(9)xx10xx10^(-9)//9`
`=10NC^(-1)`
`E_(B)=(9xx10^(9)xx20xx10^(9))/((3sqrt(2))^(2))`
`=10N//C^(-1)`
Resultant of `E_(A)&E_(C)` is `(sqrt(2)xxE_(A))=10sqrt(2)`
`E_(B)` is along `sqrt(2)xxE_(A)`
Resultant electric intensity at D is equal to
`(sqrt(2)xxE_(A))+E_(B)=10+10sqrt(2)`
`24.14NC^(-1)`
Promotional Banner

Topper's Solved these Questions

  • ELECTRIC CHARGES & FIELDS

    OSWAAL PUBLICATION|Exercise (TOPIC -2) Very Short Answer Type Questions|6 Videos

  • ELECTRIC CHARGES & FIELDS

    OSWAAL PUBLICATION|Exercise (TOPIC -2 )Short Answer Type Questions - I|7 Videos

  • ELECTRIC CHARGES & FIELDS

    OSWAAL PUBLICATION|Exercise (TOPIC -1)Long Answer Type Questions|2 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    OSWAAL PUBLICATION|Exercise TOPIC-2 DE-BROGLIE RELATION (NUMERICAL PROBLEMS)|7 Videos

  • ELECTROMAGNETIC INDUCTION

    OSWAAL PUBLICATION|Exercise TOPIC-2 (Eddy Current, Self & Mutual Inductance) (Numerical Problems)|3 Videos

Similar Questions

Explore conceptually related problems

Two point charges of 6 nC and 12 nC are placed at the corners of B and C of an equilateral triangle ABC of side 0.03 m . Calculate the magnitude of the resultant electric intensity at the vertex A of triangle.

Three point charges +10nC,-15nC and +20nC are placed at the corners A,B and C respectively of a square, ABCD of side 0.1m. Calculate the amount of work done to transfer -100nC from the point 'D' to the point 'O'.

Four point charges +2nC,-3nC,+4nC,-5nC are placed at the vertices A,B,C,D of a square ABCD of side 0.2 m respectively. Calculate the electric field intensity at a point of intersection of the diagonals.

Three point charges of +2q, +2q and -4q are placed at the corners A, B and C of an equilateral triangle ABC of side 'x'. The magnitude of the electric dipole moment of this system is.

Three point charges 3 nC , 6 nC and 9 nC are placed at the corners of an equilateral triangle of side 0.1 m . The potential energy of the system is

A point charge + 10 mu c is a distance 5 cm directly above the centre of a square of side 10 cm as what is the magnitude of the electric flux through the square

Charges 5mC, 4inC and 6mC are placed at the three corners A, B and C respectively of a square ABCD of side X metre. Find, what charge must be places at the fourth corner so that the total potential at the centre of the square is zero.

Charges 2mC, 4mC and 6mC are placed at the three corners A, B and C respectively of a square ABCD of side x metre. Find, what charge must be placed at the fourth corner so that the total potential at the centre of the square is zero.