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Electronics Engineering
Electronics Engineering is a branch of engineering that deals with practical applications of electronic components, devices, systems, or equipment. Electronics are devices that operate on low voltage sources, as in electron tubes, transistors, integrated circuits, and printed circuit boards and use electricity as part of its driving force.
24,372 Questions
Why is ferric chloride stored in airtight bottles?
Ferric Chloride is an intensely hygroscopic chemicaland thus will literally suck water from the air, dissolving into this water spontaneously forming a dark brown solution. Keeping it in an airtight container prevents this, keeping the crystals in solid form.
Why do we mostly use indirect semiconductors?
The indirect band gap semiconductors like silicon and germanium are mostly used because they are elemental, plentiful, and easier to process than the direct band gap semiconductors which are alloys or compounds.
Write the Units of electrical pressure electric current resistance energy and electric charge?
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It is a device used to sense the temperature within the motor coils. There are usually three in a three phase motor, one for each coil. The output of the thermistor is used to hold an over temperature relay designed to be used with thermistors, in a closed position. The start circuit of the motor control is connected thriough this relay through N.C. contacts. If the motor goes into a over heat condition then the control relay drops out, the contacts of the relay open which in turn de-energizes the magnetic contactor and disconnects the motor from the supply voltage.
What is the circuit diagram for dc motor control using rotary optical encoder?
The circuit for a standard DC motor controller has two wires going to the armature and two wires going to the field. The encoder is typically wired to the controller be it a plc or some type of drive control. the diagram will differ somewhat from installation to installation therefore this question does not have a specific answer.
What are the applications of radars in the military?
Primarily, radar is used in all aspects as a ranging device. It is extremely accurate in determining distances in navigation systems, fire control systems and tracking devices used on aircraft, ships, and missles. The specific military uses are tracking ships and aircraft and fire control systems for missles, ships and aircraft. They even use systems for conter battery, literally tracking an artillery shell and determining the location of the firing weapon.
What are the Uses of electronic hand tools?
Electronics hand tools are used to facilitate the implementation and manipulation in the production of electronic circuits at their best onto veroboards or printed circuit boards (PCB).
It depends on how many Amps (current) are applied to the voltage. Watt = Volts x Amps. e.g. 12 volts @ 5 amps = 60 watts
What does PLC mean after attorneys name?
It means Professional Limited Liability Corporation. Inc (incorporated), Co (company), and Ltd (limited) are all designations for a corporate entity. Those who invest in a corporation are not liable for the corporation's debts. An LLC is a limited liability company, which is kind of a cross between a corporation and a partnership. It protects partners who merely invest money in the partnership and play no active role in the business. In both cases (corporations and LLCs), the liability of the protected investors is limited to the amount of the investment. In other words, if the company or LLC is unable to pay its debts, the investors will lose the money they invested, but the creditors cannot pursue the investors personally. A PC is a professional corporation, which is a corporation formed by 1 of the 4 professions (lawyer, doctor, accountant, and engineer). A PLC is a limited liability professional corp, so it is essentially an LLC used by the professions.
Why the 2n2222 amplifier voltage gain is less than one?
Without knowing things about the circuit that you don't give, this question can't be answered. The 2N2222, as any other bipolar transistor, can give large amounts of voltage gain in both CE & CB configuration, but less than one voltage gain in CC configuration. Nothing is unique about the 2N2222.
Polling data is just getting data or taking a pole (survey).
Explain the working of LDR and mention any five applications of LDR in detail?
A photoresistor, light dependent resistor (LDR) or cadmium sulfide (CdS) cell is a resistor whose resistancedecreases with increasing incident light intensity. It can also be referred to as a photoconductor.
Applications:
camera light meters, street lights, clock radios, alarms, and outdoor clocks
How high should your outdoor scanner antenna be?
A: That depends on local laws but most important is the power output limitations that must be followed
Which component translates a synchronous serial connection to time division multiplexed connection?
The router.
What memory chip cannot be written on or erased by the computer user without special equipment?
one time PROM, UVPROM
What is the pin diagram of Integrated Chip L293D?
L293D is having 20 pin IC and also 16 pin IC.
description of 20 pin is:
1-enable 1
2- input 1
3- output 1
4,5,6,7,14,15,16,17- ground
8- output 2
9- input 2
10,20-vs
11-enable 2
12- input 3
13-output 3
18-output 4
19-input 4
description for 18 pin:
1-enable 1
2- input 1
3- output 1
4,5,12,13- ground
6-output 2
7- input 2
8,18-vs
9-enable 2
10-input 3
11-output 3
14-output 4
15-input 4
When was bubble wrap invented?
It was invented in 1960.
Bubble wrap was invented by too engineers named Alfred Fielding and Marc Chavannes in 1957. This invention is a trademark brand owned by Sealed Air Corporation.
How many lights and fixtures are inside both sides of the Eisenhower Tunnel?
4000 8ft fixtures all total. Likely T12 florescents. Upgrade to T8's would save 32kW of demand and 280,320kWh per year, roughly equal to $14k per year in energy costs. (Part sourced from http://www.dot.state.co.us/Eisenhower/Milestones.asp, and part calculated.)
What is Emphasis by Iteration?
speacial importance, value, or prominence give to something/ stress liad on a word or words in speaking.
Why a inductor is used in series before diode instead of resistor?
An inductor will supply better current source.
