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Two identical metal spheres carry charges of +5μC and -5μC. If they are brought

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Question: Two identical metal spheres carry charges of +5μC and -5μC. If they are brought into contact and then separated, what will be the charge on each sphere?

Options:

  1. 0μC
  2. +5μC
  3. -5μC
  4. +2.5μC

Correct Answer: 0μC

Solution: 

When brought into contact, the charges will redistribute equally, resulting in 0μC on each sphere.

Two identical metal spheres carry charges of +5μC and -5μC. If they are brought

Practice Questions

Q1
Two identical metal spheres carry charges of +5μC and -5μC. If they are brought into contact and then separated, what will be the charge on each sphere?
  1. 0μC
  2. +5μC
  3. -5μC
  4. +2.5μC

Questions & Step-by-Step Solutions

Two identical metal spheres carry charges of +5μC and -5μC. If they are brought into contact and then separated, what will be the charge on each sphere?
  • Step 1: Identify the charges on the two metal spheres. One sphere has a charge of +5μC and the other has a charge of -5μC.
  • Step 2: When the two spheres are brought into contact, the charges will move between them until they are equal.
  • Step 3: Calculate the total charge by adding the charges of both spheres: +5μC + (-5μC) = 0μC.
  • Step 4: Since the total charge is 0μC and there are two identical spheres, the charge will be evenly distributed.
  • Step 5: Divide the total charge by the number of spheres: 0μC / 2 = 0μC for each sphere.
  • Step 6: After separating the spheres, each sphere will have a charge of 0μC.
  • Charge Redistribution – When two conductive objects are brought into contact, their charges redistribute evenly due to the principle of conservation of charge.
  • Conservation of Charge – The total charge before and after contact remains constant; in this case, +5μC and -5μC sum to 0μC.
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