Electromagnetic fields are everywhere, all around us. Some are generated naturally, but in vast majority of cases, it’s we humans that are generating them with artificial, electronic means. Everything ...

Editor's Note: The last electroscope I used employed gold leaves or pith balls to indicate charge, but here's an electronic version with no moving parts. Though one of our reviewers felt the design ...

This diy electroscope circuit can precisely measure electrostatic charge. The charge to be measured is stored on C1 (a high quality MKT capacitor with a value of 1-2 μF). The voltage (U) across the ...

A nonmetal desk or table (For example, a wooden, plastic or glass desk or table would work.) At least one material to test (It should be no larger than the plate or can be folded to be small and able ...

THOSE who experimentalise with the usual form of gold-leaf electroscope must know well that the instrument requires a vast amount of preparation and drying before it is ready for use, and also that in ...

(PhysOrg.com) -- In May a University of Maryland-led team of scientists reported some previously unknown features in the energy spectra of cosmic ray nuclei, which have been studied for almost 100 ...

I FIND that a very convenient way of charging an ordinary gold-leaf electroscope is to rub the charging rod with the glass bulb of a glowing carbon filament lamp. The leaf system becomes negatively ...

A Comparatively Easy Task When You Know the Way ...

The history of the diode is a fun one as it’s rife with accidental discoveries, sometimes having to wait decades for a use for what was found. Two examples of that are our first two topics: thermionic ...