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What are the quantities involved in Ohm's law?
-- Voltage between two points-- Resistance of the conducting path between the same two points-- Current that flows between the two pointsAnswerThere are two quantities involved with Ohm's Law: potential difference and current. For a circuit to obey Ohm's Law, the ratio of potential difference must be constant. Not many circuits obey Ohm's Law. Those that do, are called 'linear' or 'ohmic' circuits; those that don't are termed 'non-linear' or 'non-ohmic'.
Can you use a two wire horn to replace a three wire?
probably yes.
How do you check a resistor?
You can measure directly with an Ohm Meter, often combined with a Volt Meter. Or you can measure the voltage across the resistance and the current to calculate resistance as Current divided by Voltage.
How do you connect a 3 wire fixture to a 2 wire fixture that are connected to the same switch what do you connect the red wire to?
A three wire fixture most likely is one that has two separate loads within it. An example is a ceiling fan with a light fixture. If the three wire is used to separately switch the two loads you have to make a decision as to which load you want to work with the two wire fixture. Once that decision has been made connect the two wire fixture in parallel with the your selected load on the three wire fixture. On these types of installations the three wire fixture is usually controlled by two separate switches in a two gang box. The red and black wires of the three wire terminates on the bottom of either switch. The white wire is connected to the incoming neutral. The top of the switches are paralleled together with the "hot" feeder from the distribution source.
Why is a red colored wire in a 120 volt circuit and what does it do?
It is used as a hot wire. <<>> In a three conductor cable set the third wire colour is red. In home wiring a three wire cable is used in a couple of locations. If the circuit involves a three way switching circuit, the cable between the two light junction boxes is fed with a three wire cable. Check the Internet for three way lighting connections. The other location a three wire cable is used is in split circuitry. Your kitchen counter receptacles use this method of wiring. The tie bar in the receptacle is removed on the hot (brass colour) side of the receptacle and the red wire is connected to the top brass screw and the black wire is then connected to the bottom brass screw of the receptacle. The white wire, as always, is connected to the silver coloured screw of the receptacle. Another example of using a three wire cable is to take two circuits from the distribution panel to two separate circuits on the other side of the house instead of running two, two wire circuits. The three wire cable is terminated in a junction box and two two wire circuits are feed from this junction box to the circuits that require power. The two two wire circuits will use the white wire of the three wire cable as a common neutral.
What is difference between 3 wire and 4 wire RTD sensor?
An RTD or Pt100 sensor is connected with two, three or four wires to the measuring device.we learned that we are in fact measuring resistance to determine the temperature. Now when measuring the resistance of the sensing element, we also measure the resistance of the leads and cables used. This gives an error! To compensate for this, the three wire type (bridge) is used, giving enough accuracy in most industrial applications. Even better accuracy is possible with a four wire Pt100 (laboratory applications). Our Pt100 panel mounted indicators have an offset compensation when using two wire sensors.
What is the difference between thermocouple and RTD?
A thermocouple measures temperature difference between two points, producing a tiny voltage corresponding to the difference in temperature. To measure temperature with a thermocouple, you need to know the temperature of one junction and calculate the difference from the table or equation for the type of t/c used. An RTD changes resistance in response to temperature--to measure temperature with an RTD you measure its resistance (usually by putting a known voltage across it and measuring the current).
How temperature transmitter work?
A temperature transmitter works by connecting to it some form of temperature sensor. For example a RTD (Resistance temperature device) or Thermocouple. In the case of a RTD connected to the transmitter the transmitter measures a change in resistance of the RTD proportional to the change in temperature measured. The transmitter then derives a current output (generally 4-20mA) which can be measured by an instrument, such as a PLC, loop indicator ect. In the case of a thermocouple a Milli voltage is produced at a junction of two dissimilar metals, this change in Milli voltage again proportional to the change in temperature and the transmitter again derives a current output measurable by a instrument. The transmitter will be ranged by a programming device, say for example an application where process temperatures need to be measured between 0-100 degrees, the transmitter will be ranged 0-100 degrees and thus give an output proportional to the temperature measured by the sensing element. 0 degrees = 4mA, 100 degrees = 20mA. A excitation supply will be connected to the transmitter and the 4-20mA will flow in this loop back to the measuring instrument. It is necessary to use the correct type of sensor for the application to get the best accuracy when measuring. RTD's are generally used for measuring lower temperatures where as thermocouples are used for measuring higher temperatures. There are several types of RTD's such as 2 wire, 3 wire and 4 wire and an even greater range of thermocouples depending on the temperatures and measuring environment.
What is the definition of an ohmic conductor?
An ohmic resistor is a resistor that obeys Ohm's law, and a non-ohmic one dose not. All resistors resistance will begin to change as there temperature changes, and often we need a resistor with a steady resistance, thus some resistors, which we refer to as ohmic, will disperse the heat being generated and therefore it will keep a steady resistance. Resistors that do not disperse their heat will have varying resistances and therefore are non ohmic. Ohms law, named after the German physicist Georg Ohm, states that the current through a conductor, between two points, is directly proportional to the potential difference (voltage) across the two points, and inversely proportional to the resistance between them. ~Ben Frilay-Cox
What are the quantities involved in Ohm's law?
-- Voltage between two points-- Resistance of the conducting path between the same two points-- Current that flows between the two pointsAnswerThere are two quantities involved with Ohm's Law: potential difference and current. For a circuit to obey Ohm's Law, the ratio of potential difference must be constant. Not many circuits obey Ohm's Law. Those that do, are called 'linear' or 'ohmic' circuits; those that don't are termed 'non-linear' or 'non-ohmic'.
What is the difference between a 2 wire and a 3 wire transmitter?
Output of two wire transmitter in mA and Output of two three transmitter in volt
How do you wire two recatable together?
How do you wire 2 receptacles together
How do you check a resistor?
You can measure directly with an Ohm Meter, often combined with a Volt Meter. Or you can measure the voltage across the resistance and the current to calculate resistance as Current divided by Voltage.
Can you use a two wire horn to replace a three wire?
probably yes.
What is normal telephone wire?
Two pair low voltage wire or CW1308
How do you connect a 3 wire fixture to a 2 wire fixture that are connected to the same switch what do you connect the red wire to?
A three wire fixture most likely is one that has two separate loads within it. An example is a ceiling fan with a light fixture. If the three wire is used to separately switch the two loads you have to make a decision as to which load you want to work with the two wire fixture. Once that decision has been made connect the two wire fixture in parallel with the your selected load on the three wire fixture. On these types of installations the three wire fixture is usually controlled by two separate switches in a two gang box. The red and black wires of the three wire terminates on the bottom of either switch. The white wire is connected to the incoming neutral. The top of the switches are paralleled together with the "hot" feeder from the distribution source.
What is a klever klaw?
It is a wrapped and bent wire gadget that has a wire two prong clam on the end and is manipulated with your thumb and two fingers.
