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The strength of an electromagnet only depends on the current in the coils?
And the amount of coils.
Why are the M and C terminals of a watt meter short circuited?
In a watt-meter there are four terminals: M,L which are the current coils and C,V which are called as pressure coils . . To measure the current the measuring instrument should be placed in series with the load but in case of voltage, the instrument should be connected in parallel to the load . . therefore M from the current coil and C from the pressure coil are can be short-circuited to measure the power of the given circuit. by hameed khan md, hyderabad e-mail:hameed.shonnu@gmail.com THANK u
What do the coils outside of a refrigerator do?
With the assistance of the condenser fan the " OUTSIDE COILS " IE:condenser coils , convert a hi temperature high pressure vapor into a hi temp hi pressure liquid.
How the magnetic field of an electromagnet defends on the current and the number of coils?
The magnetic field of an electromagnet is directly proportional to both the current passing through its coils and the number of coils. Increasing either the current or the number of coils will result in a stronger magnetic field, while decreasing them will weaken the magnetic field. This relationship is described by Ampere's law and the concept of magnetic flux.
What happens when a direct current is passed through a helical spring?
in an adjacent coils ,the current flows in same direction so there is force of attraction shortening the coils.
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)!
How the current and pressure coils of the wattmeer are connected in circuit to measure the power drawn by load?
The current coil is connected in series with the load. The voltage coil (the term, 'pressure coil' is rather archaic!) is connected in parallel with the load. The wattmeter's polarity markings must be taken into account, or the meter will read downscale (backwards).
What is the function of restraining coils in differential relay?
Restraining coils are also called as bias coils. Due to the difference in the magnetizing currents of the upper and lower current transformers the current through the operating coil will not be zero even under normal loading conditions or external fault conditions. therefore to provide stability on external faults bias coils are provided. To obtain the required amount of biasing a suitable ratio of the biasing coils with restraining coils to be provided.
What is a metering device on a refrigerator?
A metering device on a refrigerator is usually a capillary(cap)tube. It is a very small copper line located somewhere between the condenser coils (outside-hot) and the evaporator coils (cooling coils). It reduces the pressure of the refrigerant coming from outside as it enters the evap coils inside. Refrigerant cools under low pressure thus cooling desired inside area when air is blown across the cold coils. Think of a kinked garden hose and how on the spicket side of the hose the pressure is great, but on the other side the pressure is decreased. That is basically the purpose of a metering device.
What factors control the strength of an electromagnet?
The strength of an electromagnet is determined by the density of coils surrounding the magnet, and the rate of current passing through those coils.
Which of these must be used to create an electromagnet?
coils of wire, iron, and electric current
What are the parts of a dynamo?
Electric motor, the alternating-current alternator, and the rotary converter. A basic dynamo consists of a stator wound with copper coils and a magnetic armature. As the magnetic armature spins it induces a current in the copper coils.
