Micrometeorites originate from small pieces of rock from space colliding with the Earth's atmosphere at high velocity, such as the Perseid meteors which hit the atmosphere at 60 km/s. When they do so, they burn up, causing a flash of light that we see as a meteor. Many groups have been successful collecting these particles using various devices.…

The aim of this paper is to introduce a simple and low-cost experimental setup that can be used to study the eddy current brake, which considers the motion of a sliding magnet on an inclined conducting plane in terms of basic physical principles. We present a set of quantitative experiments performed to study the influence of the geometrical and…

Did you know that some strong little cylindrical magnets available in local hardware stores can have an effective circumferential current of 2500 A? This intriguing information can be obtained by hanging a pair of magnets at the center of a coil, as shown in Fig. 1, and measuring the oscillation frequency as a function of coil current.

Presents an activity for students to construct their own two-cup balances. Suggests some alternatives for rejuvenating weak bar magnets. Describes how to remove burnt carbon deposits from glass vessels. (NB)

Short articles describe the construction and use of a probe for measuring magnetic fields, the determination of the speed of electromagnetic transmission by utilizing standard time signals relayed from an orbiting satellite, and an apparent paradox in the theory of electron deflection in cathode ray tubes. (AL)

This book is written for people who tend to sit toward the back of the classroom during scientific lectures. It assumes that students remember nothing of what happened in their science classes. The book is divided into seven sections: (1) Magnetism; (2) Bending Light Waves; (3) Bacterial Stories; (4) Light Wave Craziness; (5) Homemade Science; (6)…

Describes an apparatus suitable for measuring magnetic susceptibility in the undergraduate laboratory. Several applications are considered in detail, and extension of the technique to nonmagnetic studies is briefly discussed. (Author)

Describes the construction of a demonstration toy consisting of a rotating shaft suspended by a magnetic field with the cost being around $2. (MVL)

This book contains hands-on science laboratory activities for grades 4 through 9 that use discrepant events to challenge students. All of the "puzzlers" are based upon science principles and include directions for building gadgets that explain the "puzzlers." Topics covered include: volume conservation, magnetic phenomena,…

Describes an undergraduate physics experiment for studying Curie temperature and Curie constant of a ferromagnetic material. The exchange field (Weiss field) has been estimated by using these parameters. (HM)

A magnetic multipole apparatus suitable for the physics teaching laboratory is described. The apparatus enables the student to measure the magnetic field configuration of a single large coil, and of systems of one or more small coils. (Author/DS)

Studies magnetic oscillation using an air track. Ceramic magnets are attached to the cart and also are used as dampeners in place of the springs. The resulting oscillations are fairly sinusoidal and is a good example of simple harmonic motion. (MVL)

Introduced is a magnetic compass with no moving parts. Presented are the principles of the compass and the method to make the compass. Shows a lodestone compass which is the most primitive compass form. (YP)