Ask a Doubt
Request a call back

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

CBSE Class 12-science Answered

Two identical metal spheres have charges +15μC and +25μC areseparated by a distance. If the spheres are first brought into contact and then separated to the original distance, then the ratio of the new force to the previous force is 
Asked by mohammedmuhsin786786 | 01 Jul, 2021, 08:33: PM
answered-by-expert Expert Answer
Let q1 and q2 are the charges on sphere after they are made to get contact with each other.
 
When they are in contact , both spheres are at same potential.
 
Since both spheres are identical, and they are at same potential,  then q1 = q2
 
Since intial charges on spheres are 15 μC and 25 μC , by conservation of charge , we have
 
q1 + q2 = ( 15 + 25 ) μC = 40 μC 
 
Hence , we get , q1 = q2 = 20 μC .
 
If the distance between the charges are equal , mutual repulsion force is proportional to the
product of their charge magnitudes.
 
Hence ratio of new force to previous force  = ( 20 × 20 ) / ( 15 × 25 )  = 16/15
Answered by Thiyagarajan K | 01 Jul, 2021, 09:52: PM

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 12-science - Physics
calculate the distance between two protons if the repulsive force acting between them is equal to weight a proton
Asked by rishabhverma895334 | 01 Mar, 2024, 07:24: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
electric charges
question image
Asked by rameshsanju123 | 08 Feb, 2024, 08:45: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
explain coulambs law give unit and dimensions of electrostatics constant and coulambs law in vector form with superposition principle
question image
Asked by bhatig9772 | 09 Jan, 2023, 06:48: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
calculate column b force between alpha particles separated by a distance of 3.2 into 10 to the power minus 15 m in air
Asked by bhagawan5225 | 06 May, 2022, 05:58: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
Two similar spheres having +Q and -Q charges at a kept distance . F force act on between two.if at the middle of the two sphere another similar sphere having +Q is kept then it experience a force in magnitude and direction as
Asked by nonuhasan2 | 28 Nov, 2021, 09:43: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
what is dielectric current
Asked by komalshakatawat18 | 19 Sep, 2021, 05:47: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
There is one charged tiny spherical oil drop and the magnitude of electric field intensity at a point on its surface is E. If n such drops are combined to make a single drop then what will be the net electric field intensity at a point on the surface of the bigger spherical drop. Assume that charge is uniformly distributed over the volume of oil drop.
Asked by jangraarti2 | 31 Jul, 2021, 07:12: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
the force between two charges at distance r is f what will be the force between these charges if the distance between them is doubled and charges are placed in a medium of dielectric constant 10 ?
Asked by aditya.loya9821 | 23 Jul, 2021, 06:44: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
A point charge qa = + 100 c is placed at point a (1, 0, 2) m and another point charge qb = +200c isplaced at point b (4, 4, 2) m. Find :(i) magnitude of electrostatic interaction force acting between them(ii) find a f(force on a due to
Asked by raghavsumit9690 | 10 Jul, 2021, 01:30: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
Two identical metal spheres have charges +15μC and +25μC areseparated by a distance. If the spheres are first brought into contact and then separated to the original distance, then the ratio of the new force to the previous force is 
Asked by mohammedmuhsin786786 | 01 Jul, 2021, 08:33: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×