Electronics Engineering

The 555 is a timer, not a counter.

p-type semiconductor A semiconductor that is missing electrons is called an electron hole.

True

the voltage across that resistor will increase if it is in series with the other resistors.

the current through that resistor will increase if it is in parallel with the other resistors.

According to the different coefficient of resistance change, thermistors are divided into two types: positive temperature coefficient thermistor (PTC), whose resistance value increases with increasing temperature, and negative temperature coefficient thermistor Resistance (NTC), whose resistance value decreases with increasing temperature.

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VDR means Voltage Dependent Resistor, which is also called varistor.

Varistor is a resistance device with non-linear volt-ampere characteristics. It is mainly used to clamp voltage when the circuit is subjected to overvoltage and absorb excess current to protect sensitive devices. Because it has the advantages of high surge withstand, large current processing and high volume absorption, fast response time and low leakage current, it is widely used in power systems, surge suppressors, motor protection, automotive electronic systems, household appliances, etc.

We're JYH HSU(JEC) Electronics Ltd (or Dongguan Zhixu Electronic Co., Ltd.), an electronic components manufacturer. You may google search "JYH HSU" to find our official website.

A varistor is a "variable resistor". When its value changes it then changes the amount of electricity it drops. Some of the energy goes to do the job; some of the energy is "dumped" out as heat. How about this: the volume control on your radio is a varistor. A dimmer switch on your living room lights is a varistor.

A The term signify a range of frequency that are either excluded or included as a pass or no pass situation. The frequency are not set to a specific range it just depends when designing what is to be included or excluded for a particular circuit.

Electrolytic capacitors are used for power filter, decoupling, signal coupling and time constant setting, DC blocking, etc.

Polarized electrolytic capacitors usually play a role in power supply circuits or intermediate frequency and low frequency circuits for power supply filtering, decoupling, signal coupling, time constant setting, and DC blocking. Generally electrolytic capacitors cannot be used in AC power circuits. When used as filter capacitors in DC power circuits, its anode (positive) should be connected to the positive terminal of the power supply voltage, and the cathode (negative) should be connected to the negative terminal of the power supply voltage. Otherwise it will damage the capacitor.

We're JYH HSU(JEC) Electronics Ltd (or Dongguan Zhixu Electronic Co., Ltd.), an electronic components manufacturer. You may google search "JYH HSU" to find our official website.

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Ohm's Law: Resistance in ohms is voltage in volts divided by current in amperes.

double if resistance is considered same.

The series circuit becomes an open circuit because there is no remaining path.

There are many places where you could learn to draw a diagram. The internet is a great resource for example.

When a story is distorted in order to manipulate the audience

Double Blind Testing -

A potentiometer is another name for a variable resister used for voltage dividing. Potentiometers have three tabs on them The two outer most tabs have the full resistance of the device across them. The center tab is connected to the wiper that slides across the surface of the resister. A voltage is applied to the two outside tabs on the potentiometer. A voltage of your choosing will appear across either the left tab to the center wiper tab or from the right tab and the center wiper tab. A potentiometer of this type is used to control the speed output of variable frequency drives. A 10K potentiometer has 10VDC applied across the two outside tabs If the drive sees the full 10 volts it allows the drive to go to full output and the motor will run at full speed. With the potentiometer's center tab wiper at half position a voltage of 5 VDC will appear to the drive. When the drive sees the 5 volts it tells the drive to go to half speed output and the motor will run at half speed. This potentiometer is linear so no matter where the wiper is positioned, the motor speed will follow the potentiometer settings from 1% right up to 100%

A common emitter BJT transistor has the emitter ground. So u measure input voltage at base with respect to the ground, i.e; emitter and also u measure the output voltage at collector with respect to the ground, i.e; emitter. Hence, the emitter is common and thus the name.

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Potential free contacts (also called "dry contacts") are simply contacts which are physically operated with the main device, but not electrically connected to it. For example a motor contactor often has auxiliary contacts that are operated by the main coil and open and close at the same time as the main contacts but are not used for control of the motor starter. If they are connected to an outside circuit to indicate the status of the starter without being powered by the motor supply they would be considered potential free contacts.

These type also called Signal-Contacts.

In case of relays and switches if the common/pole is connected internally to a given potential like a 110V phase etc., the contact is not POTENTIAL FREE but if both the common and the normall open (and at time also the normally closed) contacts are presented to the user for connecting in his system as he pleases,the contact is said to be "potential-free".

Like a normal diode............. unless it includes a "back biased" diode to prevent conduction in this mode as is common in zener diodes rated at about 10 volts or more, then it acts as an open circuit.

rectifier transformer converts acinto dc.but,power transformer convert step up or step down ac energy without changing frequency

Long shore drift means the movement of material along a coast by waves that approach at an angle to the shore but recede directly away from it. It transports sediments.

It is capable of speed and full

No Voltage drop due to wire