Two metal balls are suspended as shown in the figure. A glass rod is rubbed with silk to make it charged. Now, both the balls are individually touched with this glass rod. What would we observe?

The balls attract each other.

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The balls repel each other.

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Neither attraction nor repulsion

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The balls will heat up.

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Solution

The correct option is B The balls repel each other.
When the glass rod is rubbed with silk, it becomes charged. Now, when both the metal balls touch the glass rod, both acquire the same kind of charge as that of the glass rod. As we know that like charges repel each other, the two balls would repel each other.

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Similar questions

Two metal balls are suspended as shown in the figure. A glass rod is rubbed with silk to charge it. Now, touch both the balls with the glass rod. What is the observation that can be noted?

Suspend two plastic balls as shown in the figure. A glass rod is rubbed with silk to make it charged. One of the balls is touched with the glass rod and the other is touched with the silk.What can we observe? Give reason for the observation. [3 MARKS]

A glass rod is rubbed with silk to make it charged. Now, touch both the balls with this glass rod. The balls each other.

Q. Now that we know that the two glass rods become charged when rubbed with a silk cloth, it would be safe to conclude they acquire

___

charges.

Q. A glass rod rubbed with silk is brought close to two unchanged metallic spheres in contact with each other inducing charges on them as shown in Figure. Describe what happens, when

(i) the spheres are slightly separated

(ii) the glass rod is subsequently removed and finally

(iii) the spheres are separated far apart

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