You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard VIII

Physics

Electrification

Two identical...

Question

Two identical conducting balls having positive charges $q_{1}$ and $q_{2}$ are separated by a distance r. If they are made to touch each other and then separated to the same distance, the force between them will be

less than before

No worries! We‘ve got your back. Try BYJU‘S free classes today!

same as before

No worries! We‘ve got your back. Try BYJU‘S free classes today!

more than before

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

zero

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B more than before
If they are made to touch each other, the electrostatic conduction will occur. As a result the total charge will get distributed equally on both the balls because both the balls are identical in nature.

Initially, $F \propto q_{1} q_{2}$ (Since $F = \frac{k q_{1} q_{2}}{r^{2}}$ )

Now after making contact, charge on each ball will become $Q_{1} = Q_{2} = \frac{q_{1} + q_{2}}{2}$
Now, $F^{'} \propto (\frac{q_{1} + q_{2}}{2})^{2}$
(Because they are separated to the same distance)

From above we can say that $F^{'} > F$

Suggest Corrections

Similar questions

Q. Two identical small conducting spheres having unequal positive charges

q_{1}

and

q_{2}

are separated by a distance r. If they are now made to touch each other and then separated again to the same distance, the electrostatic force between them in this case will be :

Q. Two identical small conducting spheres carry charges of

Q_{1}

and

Q_{2}

with

Q_{1} >> Q_{2}

. The spheres are d distance apart. The force they exert on each other is

F_{1}

. The spheres are made to touch each other and then separated by a distance d. The force they exert on each other now is

F_{2}

. Then

F_{1} / F_{2}

is :-

Q. Two identical conducting balls A and B have positive charges

q_{1}

and

q_{2}

respectively. But

q_{1} \neq q_{2}

. The balls are brought together so that they touch each other and then kept in their original positions. The force between them is?

Two identical metal balls with charges +2Q and -Q are separated by the same distance, and exert a force F on each other. They are joined by a conducting wire, which is then removed. The magnitude of the force between them will now be

Q. Two identical conducting spheres

A

and

B

, carry equal charge. They are separated by a distance much larger than their diameter, and the force between them is

F

. A third identical conducting sphere,

C

, is uncharged. Sphere

C

is first touched to

A

, then to

B

, and the removed. As a result, the force between

A

and

B

would be equal to

Join BYJU'S Learning Program

Two identical conducting balls having positive charges q1 and q2 are separated by a distance r. If they are made to touch each other and then separated to the same distance, the force between them will be

Two identical conducting balls having positive charges $q_{1}$ and $q_{2}$ are separated by a distance r. If they are made to touch each other and then separated to the same distance, the force between them will be