An electric field is defined in terms of `q_(0)` a small positive charge. If the definition was in terms of a small negative charge of the same magnitude, then compared to the original field the newly defined electric field.
(a) would point in the same direction and have the same magnitude.
(b) would point in the opposite direction and have the same magnitude.
(c ) would point in the same direction and have the different magnitude.
(d) would point in the opposite direction and have the different magnitude.

Explanation

To solve the problem, we need to analyze how the definition of the electric field changes when we switch from a positive charge \( q_0 \) to a negative charge of the same magnitude.

### Step-by-step Solution:

1. **Understanding Electric Field Definition**:
The electric field \( \vec{E} \) at a point in space due to a charge \( Q \) is defined as the force \( \vec{F} \) experienced by a small positive test charge \( q_0 \) placed at that point, divided by the magnitude of that charge:
\[
\vec{E} = \frac{\vec{F}}{q_0}
...