Electric Charge and Field
Which of the following statements are true?
Two negative charges repel each other. A positive charge and a negative charge attract each other. Electric charge is quantized. Electric charge is conserved.
Is it possible for the electric field between two positive charges to equal zero along the line joining the two charges?
Yes, regardless of the magnitude of the two charges
Which of the following statements are true for electric field lines? Check all that apply. *At every point in space, the electric field vector at that point is tangent to the electric field line through that point. *Electric field lines point away from positive charges and toward negative charges. *Electric field lines are continuous; they do not have a beginning or an ending. *Electric field lines are close together in regions of space where the magnitude the electric field is weak and are father apart where it is strong. *Electric field lines can never intersect.
-At every point in space, the electric field vector at that point is tangent to the electric field line through that point. -Electric field lines point away from positive charges and toward negative charges. -Electric field lines can never intersect
Which of the following statements are true? Check all that apply. *The electric force acting on a point charge is proportional to the magnitude of the point charge. *The electric field created by a point charge is constant throughout space. *In a uniform electric field, the field lines are straight, parallel, and uniformly spaced. *Electric field lines near negative point charges circle clockwise. *Electric field lines near positive point charges radiate outward.
-The electric force acting on a point charge is proportional to the magnitude of the point charge. -In a uniform electric field, the field lines are straight, parallel, and uniformly spaced. -Electric field lines near positive point charges radiate outward.
The strength of the electric field at a certain distance from a point charge is represented by E. What is the strength of the electric field at twice the distance from the point charge?
At twice the distance, the strength of the field is E/4.
Two charged objects are separated by some distance. The charge on the first object is greater than the charge on the second object. How does the force between the two objects compare?
The charged objects exert electrostatic forces on each other that are equal in magnitude and opposite in direction.
A positively charged rod is brought close to one end of an uncharged metal rod but does not actually touch it. What type of charge does the end of the metal rod closest to the positively charged rod acquire?
The end of the metal rod closest to the positively charged rod acquires a negative charge
Two charged objects separated by some distance attract each other. If the charges on both objects are doubled with no change in distance between them, what happens to the magnitude of the force between the objects?
The force between them quadruples.
A plastic rod is rubbed with a fur. During the rubbing process, the rod acquires a negative charge. What type of charge does the fur acquire?
The fur acquires a positive charge.
When a point charge of +q is placed on one corner of a square, an electric field strength of 2 N/C is observed at the center of the square. Suppose three identical charges of +q are placed on the remaining three corners of the square. What is the magnitude of the net electric field at the center of the square?
The magnitude of the net electric field at the center of the square is 0 N/C.
