A particle of charge q is placed in a uniform electric field of magnitude E. Consider the following statements about the resulting forces on the particle:
I. It has magnitude q E.
II. It is perpendicular to the direction of the field.
III. It is parallel to the direction of the field.

Which of these statement(S) is true?

A) I and III

b) I

c) III

d) II and I

e) II and III

f) II

g) all are true

h) none are true

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b.b. at twice the distance, the magnitude of the field is 2b.c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.