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If the electric potential at a point is 100 V and the charge at that point is 2

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What’s inside this PDF?

Question: If the electric potential at a point is 100 V and the charge at that point is 2 µC, what is the electric potential energy?

Options:

  1. 0.2 J
  2. 0.1 J
  3. 0.05 J
  4. 0.4 J

Correct Answer: 0.2 J

Solution:

Potential energy U = V * q = 100 V * 2 x 10^-6 C = 0.0002 J = 0.2 J.

If the electric potential at a point is 100 V and the charge at that point is 2

Practice Questions

Q1
If the electric potential at a point is 100 V and the charge at that point is 2 µC, what is the electric potential energy?
  1. 0.2 J
  2. 0.1 J
  3. 0.05 J
  4. 0.4 J

Questions & Step-by-Step Solutions

If the electric potential at a point is 100 V and the charge at that point is 2 µC, what is the electric potential energy?
  • Step 1: Identify the electric potential (V) at the point, which is given as 100 V.
  • Step 2: Identify the charge (q) at that point, which is given as 2 µC (microcoulombs).
  • Step 3: Convert the charge from microcoulombs to coulombs. 2 µC = 2 x 10^-6 C.
  • Step 4: Use the formula for electric potential energy (U), which is U = V * q.
  • Step 5: Substitute the values into the formula: U = 100 V * 2 x 10^-6 C.
  • Step 6: Calculate the result: U = 100 * 0.000002 = 0.0002 J.
  • Step 7: Convert the result to a more understandable form if needed: 0.0002 J = 0.2 mJ (millijoules).
  • Electric Potential Energy – The energy stored due to the position of a charge in an electric field, calculated as the product of electric potential (V) and charge (q).
  • Units of Measurement – Understanding the conversion of microcoulombs (µC) to coulombs (C) and the significance of joules (J) as a unit of energy.
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