Question

Two small nonconducting spheres have a total charge of Q=Q1+Q2= 90.0 μC , Q1<Q2. When placed 31.0 cm apart, the force each exerts on the other is 13.0 N and is repulsive.

Part A: What is the charge Q1?

Part B: What is the charge Q2?

Part C: What would Q1 be if the force were attractive?

Part D: What would Q2 be if the force were attractive?

Answer 1

Given and

If the force is repulsive ,the charges should be like charge,either both positive or both negative

Given

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Use formula

Solve the quadratic equation using a calculator

PART A) ANSWER:

PART B) ANSWER:

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If the force were attractive?

If the force is attractive,the charges should be unlike charge,one negative and other positive

Since ,Q₂ should be negative and Q₁ positive

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Use formula

Solve the quadratic equation using a calculator

PART C) ANSWER:

PART D) ANSWER:

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