What is the pointer adjust in multimeter?
On a traditional analog multimeter, there is a screw on the face of the meter to adjust the tension on the pointer. It lets you set the pointer to zero when there is no current, just like zeroing the bathroom scales before you step on them.
Why inductor block ac and pass dc?
When your circuit starts up, your inductor creates an electrical current in the opposite direction. With dc, this effect vanished after the circuit is started. With ac, the current keeps starting and stopping so the inductor keeps creating a current in the opposite direction.
What is the working principle of rectenna?
rectenna is nothing but RECTifying anTENNA and this converts radio waves to electricity.the radio waves may be anything such as microwaves etc.,
by what does this rectenna works?
this is only through the mesh of diodes and dipoles
Why same junction box is not used for digital and analog signals?
Signal crosstalk. Most specifically is high speed digital switching noise being picked up by analog circuits and upsetting their operation.
What is filter in digital image processing?
A filter is an effect that can be added to an image that affects the overall appearance, or apearance of a selected area, of an image.
WHY It is easy to convert an AC to a higher or a lower voltage with transformers?
AC current is constantly alternating between moving back and forwards, this maintains a changing electromagnetic field around it. This principle is used to power a AC transformer, which is made of very simple materials (copper wire and a lil bit of iron usually) and has no moving parts. DC current is moving all in the same direction. This creates a static field as no change is occurring.
Transformers rely heavily on that changing magnetic field to carry out induction and change voltages, DC power was historically put through a commutator or later an Interrupter to create movement in the magnetic field. A commutator is the active element in little electric motors that makes them spin and an interrupter is similar to those old school morse code devices that pulses (switches on and off rapidly) the DC signal to create a field travelling up and down. Once the filed has some movement in it, it was sent into an AC transformer and then converted back.
The process has evolved since then, but is still reliant on a changing magnetic field.
What is earth fault loop impedance?
An earth-fault loop is the path taken by the fault current, when an earth-fault occurs within an electrical installation, and comprises a series circuit made up of
The combined opposition of this series circuit to the flow of fault current is termed the earth-fault loop impedance, expressed in ohms.
Why does WikiAnswers incorrectly refer to UDP which stands for unreliable datagram protocol?
ANSWER According to W. Richard Stevens's book, TCP/IP Illustrated, Volume 1, UDP stands for User Datagram Protocol. It is unreliable, in the sense that there is no retrying defined in the protocol. This is in contrast to TCP, which stands for Transmission Control Protocol. TCP creates a connection layer on top of the unreliable Internet Protocol (IP), by retrying the transmission of sequence-numbered packets so that the receiver can correctly reconstruct the data as it was sent. UDP just transmits the packet, and if any attempt at guaranteeing that a packet was received is needed, it must be done by the application level, not at the protocol level. Note that although it seems like an application should never use an unreliable protocol, the overhead involved in creating TCP connections is often deemed unnecessary, especially for operations done on LANs (ARP, BOOTP, etc).
The bluk resistance of a diode depends on?
Bulk resistance of diode depends on how it is biased. The bulk resistance of a diode is the approximate resistance of the diode when it is forward biased.
What is material made of a zener diode?
SILICON same as any other diode but with different characteristics
You can watch this animation to understand the principles of sputtering and especially magnetron sputtering. The main difference between magnetron sputtering and other sputtering methods is the application of magnetic filed around the target in order to energize argon atoms for bombarding the target. Using magnetic field leads to trapping electrons in the magnetic filed created around the target which enhances plasma. This results in higher ionization of Argon atoms and bombarding rate that finally increases deposition rate. http://www.heraeus-targets.com/en/technology/_sputteringbasics/sputtering.aspx
What is the difference between filter capacitor and bypass capacitors?
Different names for the same thing. Depending on who you're talking to, they may use one or the other. A capacitor can be used to remove high frequency noise (in IC's this is usually switching noise); it can be used to remove low frequency noise also (such as for sound equipment - 60 Hz hum).
Bypass simply means power is being shunted around specific equipment (alternatively, filtering the input to certain equipment).
What is the peak load of a power supply?
A: A power supply when designed it will have some nominal criteria and also some maximum output power available which reflect to the peak load that it can stand without burning up
Super Position
What is use of RFC in Hartley oscillator?
it is a radio frequency choke which connects the dc supply to the circuit but isolate the dc supply from the high frequency oscillations generated in the feedback circuit
A: Nobody can answer that. It depends on the diode, battery on the meter, scale of the meter. It should never read zero or close to zero ohms and reversing the lead it should just be close to open but it may read some hi k ohms. A meter test is just to find shorted diodes and extremely leaking diode.
How must the components be arranged in order for electricity to flow through a circuit?
There must be at least one source of electromagnetic force, or voltage, which is connected through at least one component which uses this voltage, with an unbroken path for conducting the electricity from one terminal of the voltage source through the load and back to the return terminal of the source.
The amount of voltage available from the source must be sufficient to overcome the resistance of the load, aka the voltage sink, and the flow of current will follow a simple formula:
E = I*R, where E stands for the applied voltage, R stands for the internal resistance of the load plus the resistance of the wires between (usually very low) and I is the current which results.
If the circuit is broken, this resistance rises to nearly infinity and so current drops to zero. This is how the switches in your home control the lights.
This is a different matter for A/C since coils and other inductive loads will affect the current.
When Professor Ohm published this law in 1826, his colleagues couldn't believe that the relation was so simple, and hounded him until he retired from the university. Turns out to be a general systems behavior law.
What is the best quality camera for recording YouTube videos that is under 150?
any sony,jvc, or Panasonic