Question

The diagram shows the electric field due to point charge Q. The negative charge, A, is within the field.

Charge Q has vectors radially outward starting perpendicular from the surface. The farther you get from the charge, the shorter the vectors. All vectors point towards the charge. A point labeled A is just to the right of the charged object.
Which statements are correct? Check all that apply.

Charge Q is positive.
Charge Q is negative.
The electric field is uniform.
The electric field is nonuniform.
If charge A is negative, it moves away from charge Q.
If charge A is positive, it moves away from charge Q.

Answer 1

Correct choices:
- Charge Q is negative.
- The electric field is nonuniform.
- If charge A is negative, it moves away from charge Q.

Brief reasons:
- Field vectors pointing toward Q indicate the source charge is negative (field points toward negative charges).
- The vectors get shorter with distance, so the field strength changes with r (not uniform).
- Force on a charge is F = qE. A negative q feels a force opposite to E, so since E points toward Q a negative A is pushed away. A positive A would be pushed toward Q, not away.