Question

1. When a Wool is rubbed with a PVC, the PVC acquires a charge of magnitude 5.43nC.

a. Did the wool gain or lose electrons?

b. How many electrons were transferred during the process?

c. What is the change in the mass of the wool?

d. What is the change of the mass of the PVC?

Answer 1

a. The wool gains electrons because it has higher electron affinity compared to PVC.

b. The number of electrons transferred during the process:

$$N=Q/e=3.39·10^{10}.$$

c. What is the change in the mass of the wool?

$$m=m_eN=3.09·10^{-20}\text{ kg}.$$

d. What is the change of the mass of the PVC?

$$m=m_eN=3.09·10^{-20}\text{ kg}.$$