Balloon Excess Charges Experiment

The video tutorial demonstrates an experiment with balloons and fur to explore electric charges. It presents a physics problem involving two charged balloons and guides through solving it using free body diagrams and force analysis. The tutorial emphasizes the importance of symmetry and approximations in calculations, compares electric and gravitational forces, and concludes with problem-solving insights.

What happens to the balloons after rubbing them with fur?

• They attract each other.

• They repel each other.

• They remain neutral.

• They burst.

What is the significance of symmetry in the problem statement?

• It simplifies the calculations.

• It makes the problem unsolvable.

• It complicates the problem.

• It has no effect on the problem.

Which force needs to be broken into components in the analysis?

• Gravitational force

• Normal force

• Electric force

• Tension force

What trigonometric identity is used to solve for tension?

• All of the above

• Cosine equals adjacent over hypotenuse

• Tangent equals opposite over adjacent

• Sine equals opposite over hypotenuse

How does the electric force compare to the gravitational force between the balloons?

• The electric force is much smaller.

• They are approximately equal.

• The electric force is much larger.

• The gravitational force is much larger.

What is the approximate magnitude of the electric force between the balloons?

• 5 * 10^-5 Newtons

• 7 * 10^-3 Newtons

• 3 * 10^-15 Newtons

• 1 * 10^-9 Newtons

What is the final calculated excess charge on each balloon?

• 2.4 * 10^-7 Coulombs

• 1.6 * 10^-19 Coulombs

• 3.2 * 10^-6 Coulombs

• 4.8 * 10^-8 Coulombs

What assumption is made about the charges on the balloons?

• They have the same magnitude.

• They are neutral.

• They have different magnitudes.

• One is positive, the other is negative.

Why is only one significant digit used in the final answer?

• Due to high precision in measurements.

• To simplify the calculations.

• To match the problem statement.

• Because of several approximations made.

What is the average number of excess charge carriers on each balloon?

• 3 * 10^12

• 4 * 10^12

• 2 * 10^12

• 1 * 10^12