0
It's an archaic expression, which is not usually used these days. But 'voltage' was considered to equate to 'pressure' in, say, a hydraulic system. So the term pressure (as well as 'tension') has, in the past, been used in place of 'voltage' or 'potential difference', as in 'pressure coil' or 'high-tension transmission'. In North America, a 'voltage coil' is frequently termed a 'potential coil'.
Wiki User
∙ 8y ago
Add your answer:
Earn +20 pts
How do you connect energy meter in circuit?
pressure coil or voltage coil across the supply and the current coil in series.
What are the reasons why a current is induced in a coil?
Current is not induced into a coil. It's voltage that is induced into a coil. If the coil is connected to a load, or even short circuited, then a current will flow as a result of the induced voltage -but it's the voltage, not the resulting current, that's induced!Voltage is induced into a coil because the the changing magnetic field, due to the change in current (0 to Imax or vice versa) applied to that coil. The process is called 'self induction'.
What is current coil and voltage coil?
The current coil is one through which the current of source can pass. This coil is connected in series. The voltage coil is connected parallel to the applied voltage. In the current coil the quantity of current flowing is proportional to the current flowing in load while in the voltage coil, current flowing is proportional to applied supply voltage. The voltage coil current is independent of current flow in load. For a complete understanding, please refer to a watt meter diagram.
When a voltage is induced into a conductor (or coil) as a result of a change in current through the conductor the phenomenon is called?
self inductance
What is purpose of diode in solenoid?
If the coil is powered with DC voltage, an inductive voltage is created anytime power to the coil is de-energized. The inductive voltage is called an inductive kick and it is up to ten times the applied voltage and is in reverse polarity to the applied voltage. A diode or other type of suppression device must be connected across the coil of the solenoid to protect any other electronic components in the circuit that may be damaged by this voltage. The diode is connected in reverse bias across the DC solenoid coil so that when voltage is applied in normal polarity, the diode does not provide a path for current. When the solenoid coil is de-energized, the inductive voltage is the opposite polarity to the power supply, so it will flow through the diode and back into the coil. Since the coil is made of a large length of wire. the energy of the inductive voltage will be dissipated as it moves through the wire. This will render the excessive inductive voltage harmless. The fact that the inductive voltage will travel through the diode in the forward bias direction means the 0.7-1 volt drop across the diode junction will also limit the V=< (dv/dt) surge. Fig. 4 (below) illustrates an example of the diode connected across the coil of a solenoid that is powered with DC voltage.
How do you connect energy meter in circuit?
pressure coil or voltage coil across the supply and the current coil in series.
What is the difference between current coil and voltage coil?
These terms apply to the coils inside a wattmeter. 'Pressure coil' is an archaic term for 'voltage coil', which is connected in parallel with the supply, while the 'current coil' is connected in series with the load.
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.
What is meant by a primary coil and a secondary coil?
In a transformer, the primary coil is the coil that has voltage applied to it. The secondary coil is the coil that we take voltage from. Transformers are used to step up voltage, step down voltage, or simply to isolate circuits.
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 many turns of wire in a coil to produce 240V?
it depends on what is your low volatage. the turns of coil it's according to what is the voltage they are,When the coil / coil is equail voltage/voltage
What are the reasons why a current is induced in a coil?
Current is not induced into a coil. It's voltage that is induced into a coil. If the coil is connected to a load, or even short circuited, then a current will flow as a result of the induced voltage -but it's the voltage, not the resulting current, that's induced!Voltage is induced into a coil because the the changing magnetic field, due to the change in current (0 to Imax or vice versa) applied to that coil. The process is called 'self induction'.
Can you connect pressure coil instead of current coil in watt meter to measure power?
You have to connect both coils to measure power: the current coil in series with the load, and the voltage ('pressure') coil in parallel with the supply. And you have to observe the wattmeter's polarity markings if you don't want it to read downscale (backwards)!
What is current coil and voltage coil?
The current coil is one through which the current of source can pass. This coil is connected in series. The voltage coil is connected parallel to the applied voltage. In the current coil the quantity of current flowing is proportional to the current flowing in load while in the voltage coil, current flowing is proportional to applied supply voltage. The voltage coil current is independent of current flow in load. For a complete understanding, please refer to a watt meter diagram.
How can 220 volts be produced?
Voltage is a measure of "pressure" in an electrical circuit. Electrical voltage is produced as a function of the number of windings in a field coil in comparison to the number of windings in the stator of a generator. the greater difference in the number of windings the greater the voltage. This voltage can also be modified by transformers, which are coils in the circuit that transfer electricity from one coil to another by induction. The difference in the number of windings in one coil to the other coil will determine the change in voltage. So by taking a circuit with a voltage of , say, 110 volts, by installing a transformer that has twice as many windings in one coil than the other, you can transform the voltage from 110 volts to 220 volts.
What is the highest and lowest voltage of an electromagnet?
The strength of an electromagnetic is determined completely by the current through its coil, and doesn't depend on the voltage across the coil. The voltage will be (current) x (resistance of the coil).
In watt meter why pressure coil has more turn than current coil?
In an analog induction type wattmeter the pressure coil is connected accross the voltage source.It is intentionally made to have a larger number of turns than the current coil so that it's impedence increases and it draws minimum current from the circuit; causing lesser error in the reading.
