Describes a quantitative approach to the demonstration that the energy of a photon is proportional to its frequency. (CCM)

Dynamic field maps and contour curves provide a new way of depicting and analyzing the electric field of uniformly moving point charges. Presents an alternative way of graphically representing the electricity field of a uniformly moving point charge. (CCM)

Analyzes the motion of a charged point particle started from rest near the center of a charged circular ring. (CCM)

Presents a simple extension of the standard demonstration of the Meissner Effect which shows the superconductor to be a perfect conductor. (CCM)

Finds that few electricity and magnetism experiments make use of computers for data acquisition. Reports on the use of a Vernier system for the measurement of the RC time constant for the charging and discharging of a capacitor. (CCM)

Describes an ammeter that can be built for less than a dollar with commonly available parts to be used in circuits with 3-volt light bulbs. (WRM)

Presents a physics lab activity in which students determine if an electrode configuration simulates a section of concentric cylinders or concentric spheres. (WRM)

Provides a qualitative explanation for why the electric field far from a dipole is inversely proportional to the cube of the distance from the center of the dipole. (WRM)

Describes an experiment undertaken to determine what relative electric charges would result if three or more pieces of transparent tape were placed on top of each other and then separated one at a time. Makes suggestions for using the project in high school and undergraduate classes. (WRM)

Describes an alternative set-up for demonstrating Lenz's Law in which the magnet can be seen during its fall. (WRM)

Discusses in detail the claim that certain well-known physics experiments demonstrate the magnetic field produced by Maxwell's displacement current. Addresses the question of whether the displacement current acts as a source of magnetic field in the same way as a current in a wire would. (Contains 12 references.) (WRM)

Describes experiments with electrostatics that are convenient for classroom demonstrations or laboratory activities. These experiments use a Kelvin balance and a relatively inexpensive electronic scale with 0.01-g sensitivity and essentially stationary pans. (WRM)

Describes a physics demonstration that dramatically illustrates the mutual repulsion (attraction) between parallel conductors using insulated copper wire, wooden dowels, a high direct current power supply, electrical tape, and an overhead projector. (WRM)

Argues for the potential of hands on activities with simple materials to help develop understanding of physical phenomena among students of all age groups. (WRM)

Describes the construction and use of a magnetic needle that is stronger than those conventionally used for experiments with electromagnetism. (WRM)