Assertion (A): A negative charge in an electric field moves along the direction of the electric field.
Reason (R): On a negative charge a force acts in the direction of the electric field

Assertion (A): False and Reason (R): False

Explanation: A negative charge experiences force opposite to direction of electric field.

1. Evaluating the Assertion

The assertion says: "A negative charge in an electric field moves along the direction of the electric field."

By definition, the electric field points in the direction a positive charge would move. However, a negative charge experiences a force in the opposite direction to the electric field, meaning it will move in the opposite direction.

Conclusion: The assertion is incorrect.

Tip: Electric field lines always originate from positive charges and end at negative charges. This can help you visualize the direction of the field.

2. Evaluating the Reason

The reason claims: "On a negative charge, a force acts in the direction of the electric field."

The force acting on a charge in an electric field is determined by the formula:

F = qE

For a negative charge (q < 0), the force will act in the opposite direction to the electric field because the equation becomes:

F = -|q|E

Conclusion: The reason is also incorrect.

Tip: The direction of the force depends on the sign of the charge. Positive charges experience a force in the field's direction, while negative charges experience it in the opposite direction.

3. Final Conclusion

Since the assertion is incorrect (negative charges move opposite to the electric field) and the reason is also incorrect (force on a negative charge is opposite to the field), both statements are false.