The product of the charge on two down quarks is:
Correct answer: B. +1/9
- A. 4/9
- B. +1/9
- C. -1/9
- D. -2
Explanation
The charge on one down quark is -1/3.Product of the charges on two down quarks would be:-1/3 x -1/3 = + 1/9
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