Table of contents
- 0. Math Review(0)
- 1. Intro to Physics Units(0)
- 2. 1D Motion / Kinematics(0)
- Vectors, Scalars, & Displacement(0)
- Average Velocity(0)
- Intro to Acceleration(0)
- Position-Time Graphs & Velocity(0)
- Conceptual Problems with Position-Time Graphs(0)
- Velocity-Time Graphs & Acceleration(0)
- Calculating Displacement from Velocity-Time Graphs(0)
- Conceptual Problems with Velocity-Time Graphs(0)
- Calculating Change in Velocity from Acceleration-Time Graphs(0)
- Graphing Position, Velocity, and Acceleration Graphs(0)
- Kinematics Equations(0)
- Vertical Motion and Free Fall(0)
- Catch/Overtake Problems(0)
- 3. Vectors(0)
- Review of Vectors vs. Scalars(0)
- Introduction to Vectors(0)
- Adding Vectors Graphically(0)
- Vector Composition & Decomposition(0)
- Adding Vectors by Components(0)
- Trig Review(0)
- Unit Vectors(0)
- Introduction to Dot Product (Scalar Product)(0)
- Calculating Dot Product Using Components(0)
- Intro to Cross Product (Vector Product)(0)
- Calculating Cross Product Using Components(0)
- 4. 2D Kinematics(0)
- 5. Projectile Motion(0)
- 6. Intro to Forces (Dynamics)(0)
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- Uniform Circular Motion(0)
- Period and Frequency in Uniform Circular Motion(0)
- Centripetal Forces(0)
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- Newton's Law of Gravity(0)
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- Energy in Connected Objects (Systems)(0)
- Force & Potential Energy(0)
- 11. Momentum & Impulse(0)
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- Impulse with Variable Forces(0)
- Intro to Conservation of Momentum(0)
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- Ballistic Pendulum(0)
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- Conservation of Energy in Rolling Motion(0)
- Parallel Axis Theorem(0)
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- Rotational Dynamics with Two Motions(0)
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- Opening/Closing Arms on Rotating Stool(0)
- Conservation of Angular Momentum(0)
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- Intro to Angular Collisions(0)
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- 19. Fluid Mechanics(0)
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- Advanced Calorimetry: Equilibrium Temperature with Phase Changes(0)
- Phase Diagrams, Triple Points and Critical Points(0)
- Heat Transfer(0)
- 21. Kinetic Theory of Ideal Gases(0)
- 22. The First Law of Thermodynamics(0)
- 23. The Second Law of Thermodynamics(0)
- 24. Electric Force & Field; Gauss' Law(0)
- 25. Electric Potential(0)
- 26. Capacitors & Dielectrics(0)
- 27. Resistors & DC Circuits(0)
- 28. Magnetic Fields and Forces(0)
- 29. Sources of Magnetic Field(0)
- Magnetic Field Produced by Moving Charges(0)
- Magnetic Field Produced by Straight Currents(0)
- Magnetic Force Between Parallel Currents(0)
- Magnetic Force Between Two Moving Charges(0)
- Magnetic Field Produced by Loops and Solenoids(0)
- Toroidal Solenoids aka Toroids(0)
- Biot-Savart Law (Calculus)(0)
- Ampere's Law (Calculus)(0)
- 30. Induction and Inductance(0)
- 31. Alternating Current(0)
- Alternating Voltages and Currents(0)
- RMS Current and Voltage(0)
- Phasors(0)
- Resistors in AC Circuits(0)
- Phasors for Resistors(0)
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- Impedance in AC Circuits(0)
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- 32. Electromagnetic Waves(0)
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24. Electric Force & Field; Gauss' Law
Electric Charge
24. Electric Force & Field; Gauss' Law
Electric Charge: Study with Video Lessons, Practice Problems & Examples
Back to all problems
7PRACTICE PROBLEM
Consider a setup where 76 cm-long wires terminate in 25-gram spheres positioned at a 30-degree angle from the vertical axis. These spheres accumulate charge when the setup is charged. Calculate the total charge Q imparted to this system. Assume the influence of the wire mass to be negligible in your calculations.
Consider a setup where 76 cm-long wires terminate in 25-gram spheres positioned at a 30-degree angle from the vertical axis. These spheres accumulate charge when the setup is charged. Calculate the total charge Q imparted to this system. Assume the influence of the wire mass to be negligible in your calculations.