The voltage (or 'potential') coil has the higher resistance, because it is connected in parallel with the load.
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.
Current coil carries the current.
no load means the motor is acting like a coil
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
The formula you are looking for is R = E/I. Resistance = Volts/Amps.
The voltage applied to the voltage coil of a wattmeter must not exceed the voltage rating of that coil.
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.
Current coil carries the current.
the tesla coil has more resistance because it was created by tesla
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.
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.
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.
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.
A galvanometer can be converted into a voltmeter by connecting it with very high resistance.
A: That small coil is micron wire it has resistance. Current trough it makes it to glow
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.
The 'one wattmeter method' can only be used for balanced, wye-connected, loads where the load's neutral point is accessible. The wattmeter's current coil is inserted into any line conductor, and the voltage coil is connected between the same line and the neutral point. The wattmeter reading indicates the power of one phase, so the total power is three times the wattmeter reading.To measure the total power of a balanced or unbalanced wye- or delta-connected load, it is only necessary to use twowattmeters -this is called the 'two wattmeter method'. In this case, the current coils of each wattmeter are inserted into any two line conductors, and the voltage coils are connected between the two line conductors and the third line conductor. The sum of the two wattmeter readings will indicate the total power of the load.