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How wattmeter is connected in circuit?
A wattmeter has two coils: a current coil and a voltage coil. The current coil is connected in series with the load, while the voltage coil is connected in parallel with the load (just in the same way an ammeter and a voltmeter are connected). The wattmeter's polarity markings must be observed while making these connections -if the wattmeter reads 'downscale' (backwards), then the connection to either one (but not both) of the coils must be reversed.
Why the current coil of wattmeter has more thikness wire than pressure coil?
Current coil carries the current.
Why wattmeter shows negative reading during no load condition of 3phase ac induction motor?
no load means the motor is acting like a coil
What is difference between lpf and upf wattmeters?
LPF wattmeter is used for measuring power in highly inductive circuits & UPF wattmeter is used for measure power in resistance circuit in which the power factor ranges from 0.5 to unity. Answer is given by :Er. M KUMAR YADAV
If the current through a heater coil is 5 amp and the supply voltage is 120 volts the coil resistance is?
The formula you are looking for is R = E/I. Resistance = Volts/Amps.
How can you obtain three time voltage across potential coil of wattmeter?
The voltage applied to the voltage coil of a wattmeter must not exceed the voltage rating of that coil.
How wattmeter is connected in circuit?
A wattmeter has two coils: a current coil and a voltage coil. The current coil is connected in series with the load, while the voltage coil is connected in parallel with the load (just in the same way an ammeter and a voltmeter are connected). The wattmeter's polarity markings must be observed while making these connections -if the wattmeter reads 'downscale' (backwards), then the connection to either one (but not both) of the coils must be reversed.
Why the current coil of wattmeter has more thikness wire than pressure coil?
Current coil carries the current.
Which of the two coils has high resistance why?
the tesla coil has more resistance because it was created by tesla
When Replacing 12v coil on 1998 Kubota engine wg750 could it have resistance type external wiring from coil to distributor or is resistance internal in coil?
A engine coil has a high internal resistance, the needing of a suplementar resistance may be advised to you by a car electrician, who works with such brand and model of your car.
Why wattmeter measure the active power?
The wattmeter contains two coils one is current coil and other is pressure coil.the current coil is connected in series with the line and pressure coil is connected across the supply.so, the disc links with the flux which is the resultant of these two.(resultant means consider the vector resultant), which include phase angle also.the active power P=VI(cosine of angle between v & I).there fore the wattmeter measures the active power.CommentThere is no 'disc' in a wattmeter. Furthermore, the current coil doesn't measure the load current, it measures the in-phase component of the load current.
What are the purposes of connecting condensers to tweeters?
Speaker is a cupper coil that vibrates and thus making sound. Music is a AC current that flows thru this coil. At low frequencis the resistance of a coil is low and this low resistance means high current that may damage speaker coil. The cendenser cut this low frequencis so only the high frequencis can drive the tweeter and make it safe. Overall at AC current lower the frequency lower the coil resistance and higher the condenser resistance. Higher the frequency higher the coil resistence and lower the condenser resistence.
How can you test a coil to see if its bad?
To test a coil for faults, you can use a multimeter to measure its resistance. Disconnect the coil from the circuit and set the multimeter to the ohms setting; then, measure the resistance across the primary and secondary terminals. A significantly high or infinite resistance indicates a bad coil, while a very low resistance suggests a short. Additionally, visually inspect the coil for physical damage or corrosion, which can also indicate failure.
What is function of pressure coil in a watt meter?
A 'pressure coil' is an archaic term for a 'voltage coil' (UK terminology) or 'potential coil' (US terminology), as opposed to the 'current coil' in a wattmeter. This coil is connected in parallel with the supply, while the current coil is connected in series with the load.
For what purpose do you short circuit the main and common terminal in a wattmeter?
A wattmeter has two coils: a current coil, which must be connected in series with a load, and a voltage coil, which must be connected in parallel with the supply voltage. Accordingly, a wattmeter has four terminals: two for each coil. One terminal of each coil needs to be connected to the line (as opposed to neutral) conductor and, so, these terminals are connected together. Having said that, this is not absolutely necessary, and the two coils can be connected quite separately. Basically, how the two coils are connected comes down to the configuration of the load whose power is being measured.
Convortion of moving coil galvanometrr into voltmeter?
A galvanometer can be converted into a voltmeter by connecting it with very high resistance.
How cigarette lighter with small piece of electric coil withstand with high current?
A: That small coil is micron wire it has resistance. Current trough it makes it to glow
