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If the charge on a capacitor is doubled, what happens to the electric field betw

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Question: If the charge on a capacitor is doubled, what happens to the electric field between the plates? (2022)

Options:

  1. It doubles
  2. It halves
  3. It remains the same
  4. It quadruples

Correct Answer: It doubles

Exam Year: 2022

Solution: 

The electric field E between the plates of a capacitor is directly proportional to the charge. If the charge is doubled, the electric field also doubles.

If the charge on a capacitor is doubled, what happens to the electric field betw

Practice Questions

Q1
If the charge on a capacitor is doubled, what happens to the electric field between the plates? (2022)
  1. It doubles
  2. It halves
  3. It remains the same
  4. It quadruples

Questions & Step-by-Step Solutions

If the charge on a capacitor is doubled, what happens to the electric field between the plates? (2022)
  • Step 1: Understand what a capacitor is. A capacitor is a device that stores electrical energy in an electric field.
  • Step 2: Know that the electric field (E) between the plates of a capacitor is related to the charge (Q) on the plates.
  • Step 3: Remember the relationship: Electric field (E) is directly proportional to the charge (Q). This means if you change the charge, the electric field changes in the same way.
  • Step 4: If the charge on the capacitor is doubled (Q becomes 2Q), the electric field will also double (E becomes 2E).
  • Step 5: Conclude that when the charge is doubled, the electric field between the plates also doubles.
  • Electric Field and Charge Relationship – The electric field (E) between the plates of a capacitor is directly proportional to the charge (Q) on the plates, described by the formula E = Q/(ε₀A), where ε₀ is the permittivity of free space and A is the area of the plates.
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