Answer :
Let's start from the definition of attraction and repulsion. Similar charges tend to repel each other, while different charges attract. When work is done due to the force of attraction its value will be negative, while if work is done due to the force of repulsion its value will be positive.
Given this the sphere has a negative charge.
In other words, if the balloon has a positive charge, it will be attracted by the sphere with negative charge. In this case, you would not have to do a positive job to bring them together. If the balloon has a negative charge, it will be repelled by the sphere with a negative charge. In this case, you will do a positive job to unite them.
Therefore, the load on the balloon is negative.
The charge on the ballon will be Negative
What do you understand by Columbus's law of attraction and repulsion forces?
The answer to this question is based on the column's law of forces of attraction and repulsion between two charged atoms.
The formula for calculating the magnitude of the forces is given as
[tex]F=k\dfrac{q_1q_2}{r^2}[/tex]
Here [tex]q_1 & \ q_2[/tex] are the two charged atoms
r = Distance between the two particles
k is constant
Now if two charged particles are having like charges that are both charged particles carrying positive or both carrying a negative charge then there will be Force of repulsion created between them
If both the Particles have the opposite charges on them then there will be a force of attraction between them.
The charge on the ballon will be negative that's why there is positive work needed to bring the ballon towards the negatively charged sphere
Thus the charge on the ballon will be Negative
To know more about the nature of the charges follow
https://brainly.com/question/18108470