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1. How do you find the work done in moving a test charge by an infinitesimal distance in an electric field?

2. What is the amount of work involved in moving a test charge normal to the electric field?

3. What is the physical interpretation of the line integral of E between two points A and B?

4. How do you find the approximate value of the line integral of a vector along a given path?

5. How do you find the exact value of the line integral?

6. What is the physical significance of the line integral of the earth's gravitational field intensity?

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