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Measurement of ionisation energy of mercury atoms
Measurement of ionisation energy of mercury atoms

... space between S2 grid and anode and collide with the mercury atoms in this space. If the accelerating voltage reaches the value Ug so high that the product Uge is equal to the ionisation energy of mercury atoms, then positive ions of mercury start to appear in the lamp. This phenomenon will take pla ...
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LN55 - uri=media.digikey
LN55 - uri=media.digikey

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Simple automatic-shutoff circuit uses few components

... gate as C2 begins charging. The resulting high at the gate output causes a positivegoing pulse at the junction of Q1 and Q2. It also is latched, and the switch is debounced by the positive feedback through capacitor C1, which begins charging at a time constant that the selection of R1, R2, or R3 det ...
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LOVOS-5 LOVOS-10 Low voltage surge arrester

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... Valid for fixed negative grid voltage. In actively servo-controlled loop, in which the grid bypass resistor forms at the same time the plate load of the servo amplifier valve, a maximum value of 1,5 MOhms is permissible. ...
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... power is sent across long transmission lines at ______ HIGH voltages. WHY? If the voltage is high, the current will be relatively ____, low so there will be less power loss in the lines. ...
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... Sometimes heating occurs in an electric circuit without excessive current flow. On investigation a defective contact is often found somewhere in the circuit. Whenever conductors are brought together to complete a circuit, such as in a switch or in a plug and socket, it is essential that good contact ...
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... Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. For guaranteed performance limits and associated test conditions, see the Electrical Characteristics tables. Note 2: To ensure constant junction temperature, low duty cycle pulse testing is used. Note 3: Limits ...
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... The contribution of a renewable power source to the total power generation becomes more and more important. A full-bridge inverter is practically always used for interfacing this Green Power Source to the utility-grid. The control of the energy flowing from the DC source, which is corresponding to a ...
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... The IF-D95T and IF-D95OC are high-sensitivity photologic detectors housed in “connector-less” style plastic fiber optic packages. The detector contains an IC with a photodiode, linear amplifier, and Schmitt trigger logic circuit. The IF-D95T features a TTL/CMOS compatible totem-pole output, while th ...
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Transformers - Purdue Physics

... the energy delivered through the input coil must either be stored in the transformer’s magnetic field or transferred to the output circuit  Over many cycles, the stored energy is constant  The power delivered to the input coil must equal the output power Section 22.9 ...
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... input (base) voltage--hence the name voltage follower. But because the emitter can source large amounts of current to the "LOAD," it can be said, there was CURRENT amplification. 11. The collector--being high impedance--cannot drive a low impedance load. 12. The emitter--being a low impedance--can d ...
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... to measure voltage, while a meter measuring current is an ammeter. Meters are either analog or digital devices. Analog meters show the output on a scale with a needle, while digital devices produce a digital readout. Analog voltmeters and ammeters are both based on a device called a galvanometer. Be ...
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... It takes time to charge/ discharge a capacitor Time to charge/discharge is related exponentially to RC It takes energy to charge a capacitor Energy stored in a capacitor is (1/2)CV2 ...
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KS4 Electricity – Simple Circuits

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... the Vreg pin makes available a regulated voltage that can be used to supply external circuits (typically proximity detectors); but the TDE1707 itself, always uses the Vreg to supply most of its internal circuits (see: Block diagram). Internally to the TDE1707, Vreg supplies all the functional blocks ...
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... ideal ammeter would present no resistance to a circuit. Real multimeters do not achieve this ideal, so their readings will very closely match theoretical, calculated values for a circuit, but never with absolute precision. ...
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I-V curves (KL)

... Two of the most common semiconductor materials are silicon and gallium arsenide9 . Both have four valence electrons. The addition of dopant atoms with five valence electrons creates free electrons since only four are required for binding the atom in the crystal matrix. Because of the excess negative ...
Theory of Breaker Point-Triggered, Transistorized Ignition Systems
Theory of Breaker Point-Triggered, Transistorized Ignition Systems

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Current source



A current source is an electronic circuit that delivers or absorbs an electric current which is independent of the voltage across it.A current source is the dual of a voltage source. The term constant-current 'sink' is sometimes used for sources fed from a negative voltage supply. Figure 1 shows the schematic symbol for an ideal current source, driving a resistor load. There are two types - an independent current source (or sink) delivers a constant current. A dependent current source delivers a current which is proportional to some other voltage or current in the circuit.
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