Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 12-science Answered

On electric field and potential
Asked by | 02 Mar, 2008, 05:23: PM
Expert Answer

let q1=+ 5 coul  and q2 =  -10coul

let the resultant field be 0 at some point X from q1.

Remember the electric field is a vector, so while adding it you need to treat the field due to the two charges as vectors taking the direction also into consideration.

Field at any point between the charges will be in the same direction so they cannot add up to zero.

Take a point beyond the two charges, on the line joining the charges. Here the fields due to the charges are in opposite directions. Then total field due to the two charges is zero.

When you are drawing the diagram you have taken the signs of the charges into consideration. Now while solving the question you don't need to use signs of the charges.

 

9X109    5/X2   + 9X109    (  10)/ ( 30 + X) = 0

please simpify( solve the equation) this

the value of X is the Point where Electric field is zero

Please follow the same procedure for Potential also potential v= 9X10q/r

Remember that electric potential is a scalar quantity. So simply add their values and put it equal to zero. You need to consider the sign of the charges while finding the electric potential.

r=x for 5 coul charge and r is 30-x for -10 coul charge.

 

 

Answered by | 08 May, 2008, 05:54: PM
CBSE 12-science - Physics
Asked by priyr7687 | 28 Jun, 2022, 06:19: PM
ANSWERED BY EXPERT
CBSE 12-science - Physics
Asked by tahseenaamir07 | 25 Jun, 2022, 01:33: AM
ANSWERED BY EXPERT
CBSE 12-science - Physics
Asked by ekanathtanpure77 | 23 Jun, 2022, 07:56: PM
ANSWERED BY EXPERT
CBSE 12-science - Physics
Asked by vigyants | 05 May, 2022, 02:59: PM
ANSWERED BY EXPERT
CBSE 12-science - Physics
Asked by yashrajgharte24.12dgatl | 06 Aug, 2021, 09:02: PM
ANSWERED BY EXPERT
CBSE 12-science - Physics
Asked by narinderbhardaj8054 | 05 Aug, 2021, 04:42: PM
ANSWERED BY EXPERT
CBSE 12-science - Physics
Asked by yashrajgharte24.12dgatl | 19 Jul, 2021, 03:41: PM
ANSWERED BY EXPERT
×