# Problem: Three charges, q1, q2 and q3 are placed left to rigth in a straight line. The distance between q1 and q2  is twice the distance between q 2 and q3. Charge q1 is negative. If the force on charge q3 is zero, which of the following statements about q 2 is true? A) q2 is negative with a magnitude twice that of q 1 B) q2 is negative with a magnitude half that of q 1 C) q2 is positive with a magnitude one fourth that of q 1 D) q2 is positive with a magnitude one ninth that of q 1 E) q2 is positive with a magnitude equal that of q 1

###### Problem Details

Three charges, q1, q2 and q3 are placed left to rigth in a straight line. The distance between q1 and q2  is twice the distance between q 2 and q3. Charge q1 is negative. If the force on charge q3 is zero, which of the following statements about q 2 is true?

A) q2 is negative with a magnitude twice that of q 1

B) q2 is negative with a magnitude half that of q 1

C) q2 is positive with a magnitude one fourth that of q 1

D) q2 is positive with a magnitude one ninth that of q 1

E) q2 is positive with a magnitude equal that of q 1

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Coulomb's Law (Electric Force) concept. You can view video lessons to learn Coulomb's Law (Electric Force). Or if you need more Coulomb's Law (Electric Force) practice, you can also practice Coulomb's Law (Electric Force) practice problems.

What is the difficulty of this problem?

Our tutors rated the difficulty ofThree charges, q1, q2 and q3 are placed left to rigth in a s...as medium difficulty.

How long does this problem take to solve?

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What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Rappel's class at UCSD.