If two charges of +3μC and -3μC are placed 0.1m apart, what is the net electric

Practice Questions

Q1
If two charges of +3μC and -3μC are placed 0.1m apart, what is the net electric field at the midpoint?
  1. 0 N/C
  2. 54000 N/C
  3. 27000 N/C
  4. 81000 N/C

Questions & Step-by-Step Solutions

If two charges of +3μC and -3μC are placed 0.1m apart, what is the net electric field at the midpoint?
Correct Answer: 0 N/C
  • Step 1: Identify the two charges. We have a positive charge of +3μC and a negative charge of -3μC.
  • Step 2: Determine the distance between the two charges. They are placed 0.1 meters apart.
  • Step 3: Find the midpoint between the two charges. The midpoint is 0.05 meters from each charge.
  • Step 4: Calculate the electric field due to the positive charge at the midpoint. The electric field points away from the positive charge.
  • Step 5: Calculate the electric field due to the negative charge at the midpoint. The electric field points towards the negative charge.
  • Step 6: Since the magnitudes of the electric fields from both charges are equal but in opposite directions, they will cancel each other out.
  • Step 7: Conclude that the net electric field at the midpoint is 0 N/C.
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