Ch 22: Electric Force & Field; Gauss' LawWorksheetSee all chapters
All Chapters
Ch 01: Units & Vectors
Ch 02: 1D Motion (Kinematics)
Ch 03: 2D Motion (Projectile Motion)
Ch 04: Intro to Forces (Dynamics)
Ch 05: Friction, Inclines, Systems
Ch 06: Centripetal Forces & Gravitation
Ch 07: Work & Energy
Ch 08: Conservation of Energy
Ch 09: Momentum & Impulse
Ch 10: Rotational Kinematics
Ch 11: Rotational Inertia & Energy
Ch 12: Torque & Rotational Dynamics
Ch 13: Rotational Equilibrium
Ch 14: Angular Momentum
Ch 15: Periodic Motion (NEW)
Ch 15: Periodic Motion (Oscillations)
Ch 16: Waves & Sound
Ch 17: Fluid Mechanics
Ch 18: Heat and Temperature
Ch 19: Kinetic Theory of Ideal Gasses
Ch 20: The First Law of Thermodynamics
Ch 21: The Second Law of Thermodynamics
Ch 22: Electric Force & Field; Gauss' Law
Ch 23: Electric Potential
Ch 24: Capacitors & Dielectrics
Ch 25: Resistors & DC Circuits
Ch 26: Magnetic Fields and Forces
Ch 27: Sources of Magnetic Field
Ch 28: Induction and Inductance
Ch 29: Alternating Current
Ch 30: Electromagnetic Waves
Ch 31: Geometric Optics
Ch 32: Wave Optics
Ch 34: Special Relativity
Ch 35: Particle-Wave Duality
Ch 36: Atomic Structure
Ch 37: Nuclear Physics
Ch 38: Quantum Mechanics

Concept #1: Charging Objects

Additional Problems
When a glass rod is rubbed with a piece of silk, the glass rod acquires a positive charge and the silk acquires a negative charge. This process signifies that A) the glass rod was not rubbed very hard with the silk. B) the glass rod lost electrons to the piece of silk. C) the glass rod was rubbed very vigorously with the silk. D) the glass rod gained electrons from the piece of silk.
X and Y are two uncharged metal spheres on insulating stands, and are in contact with each other. A positively charged rod R is brought close to X as shown in Figure (a). Sphere Y is now moved away from X, as in Figure (b). What are the final charge states of X and Y?(a) X is positive and Y is neutral.(b) Both X and Y are neutral.(c) X is negative and Y is positive.(d) Both X and Y are negative.(e) X is neutral and Y is positive.
X and Y are two uncharged metal spheres on insulating stands, and are in contact with each other. A positively charged rod R is brought close to X as shown in the A.
A plastic rod is charged up by rubbing a wool cloth, and brought to an initially neutral metallic sphere. It  is allowed to touch the sphere for a few seconds, and then is separated from the sphere by a small distance. After the rod is separated, the rod A) feels no force due to the sphere. B) is attracted to the sphere. C) is repelled by the sphere.
A positively charged rod is brought close to an uncharged conducting ball. What happens? A. Nothing since the ball is uncharged.B. The ball becomes negatively charged.C. The ball becomes positively charged.D. The side of the ball near the rod becomes negatively charged.E. The side of the ball near the rod becomes positively charged.