Five balls numbered 1, 2, 3, 4, 5 are suspended using separate threads. The balls (1, 2), (2, 4) and (4, 1) show electrostatic attraction, while balls (2,3) and (4, 5) show repulsion, Therefore, ball 1 must bea)negatively chargedb)positively chargec)neutrald)made of metalCorrect answer is option 'C'. Can you explain this answer?

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Class 12 Exam > Class 12 Questions > Five balls numbered 1, 2, 3, 4, 5 are suspend...

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a)
negatively charged
b)
positively charge
c)
neutral
d)
made of metal

Correct answer is option 'C'. Can you explain this answer?

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Electrostatic MCQ (With Solution)Level - 1 : Test 2

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Five balls numbered 1, 2, 3, 4, 5 are suspended using separate threads...

If 1 is positively charged, then 2 should be negatively charged, then 4 should be positively charged. Now, 1 and 4 cannot attract. It means ball 1 should be neutral (2 and 4 cannot be neutral because they are showing repulsion with 3 and 5, respectively).

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Most Upvoted Answer

Five balls numbered 1, 2, 3, 4, 5 are suspended using separate threads...

Explanation:

Electrostatic Attraction:
- Electrostatic attraction occurs between objects with opposite charges.
- In this case, the balls (1, 2), (2, 4), and (4, 1) show electrostatic attraction.
- This means that ball 1 is attracted to ball 2, ball 2 is attracted to ball 4, and ball 4 is attracted to ball 1.
- Since the balls are attracted to each other, it indicates that they have opposite charges.
- If ball 1 and ball 2 are attracted to each other, it means that ball 1 is positively charged and ball 2 is negatively charged.
- Similarly, if ball 2 and ball 4 are attracted to each other, it means that ball 2 is positively charged and ball 4 is negatively charged.
- And if ball 4 and ball 1 are attracted to each other, it means that ball 4 is positively charged and ball 1 is negatively charged.

Electrostatic Repulsion:
- Electrostatic repulsion occurs between objects with the same charge.
- In this case, the balls (2, 3) and (4, 5) show electrostatic repulsion.
- This means that ball 2 repels ball 3 and ball 4 repels ball 5.
- Since the balls are repelling each other, it indicates that they have the same charge.
- If ball 2 repels ball 3, it means that both ball 2 and ball 3 have the same charge, either both are positively charged or both are negatively charged.
- Similarly, if ball 4 repels ball 5, it means that both ball 4 and ball 5 have the same charge, either both are positively charged or both are negatively charged.

Conclusion:
- From the given information, it can be concluded that ball 1 is negatively charged (attracted to ball 2), ball 2 is positively charged (attracted to ball 1 and repels ball 3), ball 3 has the same charge as ball 2 (repelled by ball 2), ball 4 is negatively charged (attracted to ball 1 and repels ball 5), and ball 5 has the same charge as ball 4 (repelled by ball 4).
- Therefore, ball 1 must be neutral as it does not show any repulsion or attraction with any other ball.
- The correct answer is option 'C', neutral.

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Five balls numbered 1, 2, 3, 4, 5 are suspended using separate threads. The balls (1, 2), (2, 4) and (4, 1) show electrostatic attraction, while balls (2,3) and (4, 5) show repulsion, Therefore, ball 1 must bea)negatively chargedb)positively chargec)neutrald)made of metalCorrect answer is option 'C'. Can you explain this answer?

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