Chapter 16, Problem 16Q

To determine

Whether we can use a negative test charge for determining an electric field.

Answer to Problem 16Q

Solution:

We can use negative test charge also for measuring electric field.

Explanation of Solution

We can use negative test charge also for determining the electric field, but the direction of electric field will be opposite to the force on the test charge. In the case of positive test charge, the direction of electric field is parallel to the force on the charge.