Electricity: Static Electricity
Static Electricity: Audio Guided Solution
Problem 20:
Dry air is generally a good insulator. It’s insulating ability breaks down when the electric field approaches a value of approximately 3x106 N/C. Determine the quantity of charge on a Van de Graaff generator that will produce an electric field strength of 3.0x106 N/C at a distance of 50. cm from the generator. Treat the generator as a point charge.
Audio Guided Solution
Habits of an Effective Problem Solver
- Read the problem carefully and develop a mental picture of the physical situation. If necessary, sketch a simple diagram of the physical situation to help you visualize it.
- Identify the known and unknown quantities; record them in an organized manner. A diagram is a great place to record such information. Equate given values to the symbols used to represent the corresponding quantity - e.g., Q1 = 2.4 μC; Q2 = 3.8 μC; d = 1.8 m; Felect = ???.
- Use physics formulas and conceptual reasoning to plot a strategy for solving for the unknown quantity.
- Identify the appropriate formula(s) to use.
- Perform substitutions and algebraic manipulations in order to solve for the unknown quantity.
Read About It!
Get more information on the topic of Static Electricity at The Physics Classroom Tutorial.
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