Brief descriptions are presented of 40 demonstrations and laboratory experiments in electrodynamics, complementing the ninth grade physics text. (Author/JH)

Describes a simple exercise in percolation theory that can be performed easily and quickly in a laboratory using paper and a hole punch. (Author/MM)

Presents a simple experiment that enables students to get a quantitative measure of the relationship between the resistance of a wire and the temperature of the wire allowing the calculation of the temperature coefficient of resistance. (JRH)

Explains how to determine the polarity of static electric charges by using an electrician's tool called the test pencil. (WRM)

Examines (in the form of a hypothetical dialog between a teacher and a student) the nature of the mantle and the spectral content of the glow which lights up both beam and mantle. These phenomena are associated with excitation of helium gas in the presence of electromagnetic and electrostatic fields. (JN)

Explains an oxidation-reduction experiment using lemon cells made from zinc and copper strips of metal placed into a lemon. (YDS)

Describes an experiment designed to disprove the belief that an electrical field originating from a point inside a closed conducting surface cannot produce an electric field outside this surface. (ZWH)

Students construct a Sierpinski gasket from resistors and measure its resistance as a function of size. Provides a brief review of what it means geometrically for the Sierpinski gasket to be fractal, followed by an explanation of how to analyze the electrical resistance on a gasket to find its fractal behavior. (MVL)

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)

Outlines a course based on a series of experiments in which students are introduced to the behavior of electrical components without any references to Ohm's law. Argues that this approach has advantages over the traditional presentation. (DDR)

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

Young children in Australia enter early childhood education settings eager to make sense of the world that surrounds them. Their interest in every day experiences is evident in the range of questions asked, many of which are scientific in nature. Intended as a resource for adults working with 4-to 8-year-old children, this booklet provides an…

Describes an experiment designed to help students gain a better understanding of the characteristics of various electronic components by incorporating a dual-trace oscilloscope in the X-Y mode in addition to direct observations of phase shifts of various signals into a laboratory exercise. (ZWH)

Presents three examples of hands-on experiments that use an inexpensive magnetic-field sensor to quantitatively study magnetic fields. (WRM)

This book contains 25 experiments designed to help students understand some of the science used every day. Each experiment includes a list of materials, a series of easy-to-follow steps, an explanation of the scientific principle demonstrated, and additional scientific facts and information. No special or expensive materials are required.…