Chapter 5.4, Problem 3aT

Suppose the charge of the particle in section II is increased from $+q_o\text{to}\text{+1}{\text{.7q}}_o$ .

1. Is the work done by the electric field as the particle travels from W to X greater than, less than, or equal to the work done by the electric field on the original particle? Explain

2. How is the quantity the work divided by the charge affected by this change?

The electric potential difference $\Delta V_{wx}$ , between two points W and X is defined to be:

   $\Delta V_{wx}=-\frac{W_{\text{elec}}}{q}$

where W is the work done by the field as a charge q travels from point W to point X.

3. Does this quantity depend on the magnitude of the charge of the particle that is used to measure it? Explain.

4. Does this quantity depend on the sign at the charge at the particle that is used to measure it? Explain.