# Electricity: Static Electricity

## Static Electricity: Audio Guided Solution

#### Problem 26:

Determine the strength of the net electric field at a location midway between two point charges. The charges are Q1 = +8.32x10-9 C and Q2 = +6.04x10-9 C. The separation distance is 24.6 cm. Suggestion: construct a diagram of the arrangement of two charges and compute each individual electric field; then sum to determine the net electric field.

## Audio Guided Solution

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## 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.