Two Point Charges of Unknown Magnitude and Sign Are a Distance

question 50

Multiple Choice

Two point charges of unknown magnitude and sign are a distance d apart.If the electric field strength is zero at a point between them on the line joining them,you can conclude that

• A)the charges are equal in magnitude but opposite in sign.
• B)the charges are equal in magnitude and have the same sign.
• C)the charges are not necessarily equal in magnitude but have opposite signs.
• D)the charges are not necessarily equal in magnitude but have the same sign.
• E)there is not enough information to say anything specific about the charges.