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Ch 20: Electric Fields and ForcesWorksheetSee all chapters
All Chapters
Ch 01: Representing Motion
Ch 02: Motion in One Dimension
Ch 03: Vectors and Motion in Two Dimensions
Ch 04: Forces & Newton's Laws of Motion
Ch 05: Applying Newton's Laws
Ch 06: Circular Motion, Orbits & Gravity
Ch 07: Part 1: Rotational Motion
Ch 07: Part 2: Rotational Motion / Inertia & Dynamics
Ch 08: Equilibrium & Elasticity
Ch 09: Momentum
Ch 10: Energy & Work
Ch 11: Using Energy
Ch 12: Thermal Properties of Matter
Ch 13: Fluids
Ch 14: Oscillations
Ch 15: Traveling Waves and Sound
Ch 16: Superposition and Standing Waves
Ch 17: Wave Optics
Ch 18: Ray Optics
Ch 20: Electric Fields and Forces
Ch 21: Electric Potential
Ch 22: Current and Resistance
Ch 23: Circuits
Ch 24: Magnetic Fields and Forces
Ch 25: Electromagnetic Induction and Electromagnetic Waves
Ch 26: AC Electricity
Ch 27: Relativity
Ch 28: Quantum Physics
Ch 29: Atoms and Molecules
Ch 30: Nuclear Physcis
Electric Charge
Charging Objects
Charging By Induction
Conservation of Charge
Dipole Moment
Coulomb's Law (Electric Force)
Electric Field
Electric Fields in Capacitors
Electric Field Lines
Electric Fields in Conductors

Concept #1: Intro to Electric Fields

Practice: A 1.5μC charge, with a mass of 50g, is in the presence of an electric field that perfectly balances its gravity. What magnitude does the electric field need to be, and in what direction does it need to point?

Concept #2: Electric Field due to a Point Charge

Example #1: Zero Electric Field due to Two Charges

Practice: If two equal charges are separated by some distance, they form an electric dipole. Find the electric field at the center of an electric dipole, given by the point P in the following figure, formed by a 1C and a −1C charge separated by 1 cm.

Example #2: Electric Field Above Two Charges (Triangle)

Practice: 4 charges are arranged as shown in the following figure. Find the magnitude of the electric field at the center of the arrangement, indicated by the point P.

Example #3: Balancing a Pendulum in Electric Field

Practice: In the following figure, a mass m is balanced such that its tether is perfectly horizontal. If the mass is m and the angle of the electric field is 𝜃, what is the magnitude of the electric field, E?