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Question

What is the value of charge on a body that carries 30 excess electrons?


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Solution

STEP 1: Given data-

  1. Number of excess electrons on body : n=30
  2. charge on a single electron : e=-1.6×10-19C (The minus sign indicates a negative charge)

Step 2: Total charge value

q=ne

where q= net charge , n= number of electron , e= charge on 1 electron

Step 3: Calculating the net charge on the body

q=ne

q=30×-1.6×10-19C

q=-4.8×10-18C

Therefore charge on a particle with 30 excess electrons is -4.8×10-18Coulomb.


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