Consider a negative charge located between two parallel metal plates that sets up a uniform, downward electric field with magnitude E.
If the charge moves opposite the direction of the electric field,
the force on the charge will be in the opposite direction of the electric field. The force will be upward.
Consider a negative charge located between two parallel metal plates that sets up a uniform, downward electric field with magnitude E.
If the charge moves opposite the direction of the electric field,
The field does a positive work on the charge
None of the above
The electric potential energy decreases
The electric potential energy increases
The field does a negative work on the charge
The field does a positive work on the charge.
A conductor with an inner cavity, shown in figure below, carries a total charge of plus 14 mu C. Within the cavity, insulated from the conductor, is a point charge of negative 10 mu C.
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If the charge moves opposite the direction of the electric field, it means that the charge is moving upward (against the direction of the field).
When a charge moves in an electric field, it experiences a force due to the electric field. The force on a charge q in an electric field E is given by the equation F = q * E.
Since the charge in this case is negative, it will experience a force in the opposite direction of the electric field. This means that the force will be directed upward.
If the charge is moving upward, it means that there is an external force acting on the charge that is overcoming the force due to the electric field. This external force could be due to another source, such as an applied force or gravity.
In summary, if a negative charge moves opposite the direction of an electric field, it means that there is an external force acting on the charge that is overcoming the force due to the electric field, causing the charge to move in the opposite direction of the field.
If the charge moves opposite the direction of the electric field, it means the charge is moving in the opposite direction to the direction in which the electric field is pointing. In this case, if the electric field is uniform and pointing downward, the charge would be moving upward.
To determine the effect of the charge moving against the electric field, we need to know the magnitude of the charge and the magnitude of the electric field. Let's denote the charge as q and the electric field as E.
If the charge is moving upward against the electric field, it means it is doing work to overcome the electric force. The electric force exerted on the charge can be calculated using the equation F = qE, where F is the force, q is the charge, and E is the electric field.
Since the charge is moving against the electric field, the direction of the force is opposite to the direction of motion. Therefore, the work done by the charge is given by the equation W = -F*d, where W is the work done, F is the force, and d is the distance traveled.
If we know the values of q, E, and d, we can calculate the work done by the charge as W = -qE*d.
It is important to note that in this situation, the charge is doing work against the electric field, which means it is gaining potential energy and losing kinetic energy. As a result, the charge's speed will decrease as it moves against the electric field.
To summarize, if a negative charge moves opposite the direction of a uniform electric field, it will experience a force in the opposite direction to its motion. The charge will do work against the electric field, and as a result, its speed will decrease.