1. A power law function generator comprising an input terminal to which an input voltage is arranged to be supplied, an output terminal, an adding circuit including an amplifier having an input and an output, a
This invention pertains to electric circuits employing conductors of the second class, i. e. materials which are insulators when cold but which are electrically conductive when hot. The present invention relates more particularly to the heating or activation of such conductors. These glowers,... ...
Most of the funding for STScI activities comes from contracts with NASA’s Goddard Space Flight Center but there are smaller activities funded by NASA’s Ames Research Center, NASA’s Jet Propulsion Laboratory, and The European Space Agency [La Agencia Espacial Europea] [Agence spatiale européenne...
In the experiment on finding the equivalent resistance of two resistors connected in series, three students connected the ammeter in their circuits in the three ways X, Y and Z shown here. Assuming their ammeters to be ideal, the ammeters have been correctly connected in ...
(b) How can you change the brightness of the lamps? View Solution Draw the circuit diagram to represent the circuit shown below. View Solution Draw the electrical symbols for a closed switch. View Solution Draw a circuit diagram to show biasing of a solar cell. Draw its characteristic curve...
In order to make contact between a mercury bath carrying electric current and the symbol, one or several holes (3) are made at the point where the symbol is placed. As a paper strip passes under the plate sequential electrical circuits are closed as a hole reaches a contact point. 展开 ...
be small. Even in cases where the currents are high, we might not actually concern ourselves about the resultant magnetic fields. On the other hand, sometimes there is solely a magnetic field, but no electric field, as in the case of a device composed only of magnets and magnetic materials...
The harmonic nature of voltage and currents is the deviation from the original or pure sine waves. Harmonic frequencies are integral multiples of the fundamental frequency and are very common in electric power systems. Order of harmonics differentiates these as even (2, 4, 6, 8, 10) and odd...
Many different types of optoisolator circuits are widely used in communications, control, and monitoring systems where data signals could provide a point of ingress for harmful voltages to damage a device. They are particularly useful where long data cables that could be susceptible to induced voltag...
A pair of remedial measures are already taken before Congress. A Senate committee recently approved a bill that would require reduction over the next decade of sulfur-dioxide emissions by 10 million tons in the States bordering on the east of the Mississippi. A tougher measure was introduced in...