Mica heating coil two kW, how many ohm resistance?
A two terminal electronic element that acts as a limiting current in a circuit. A resistor that is not to be changed is called a fixed resistor. Variable resistance is called a potentiometer or variable resistor. The ideal resistor is linear, i.e., the instantaneous current through the resistor is directly proportional to the applied instantaneous voltage. Some special resistors, such as thermistors, varistors, and sensitive components, are nonlinear in relation to voltage and current. Resistors are the most widely used components in electronic circuits. They are usually formed in different series according to their power and resistance, so that they can be used by circuit designers. Resistors are mainly used to regulate and stabilize the current and voltage in the circuit. They can be used as shunt and divider, or as circuit matching load. According to the requirements of the circuit, but also can be used for negative feedback amplification circuit or positive feedback, current voltage conversion, input voltage or current overload protection device, and can be composed of RC circuit as the oscillation, filtering, by-pass, differential and integral time constant and components etc..
If the resistance of a resistor value near zero ohm (for example, two points between the large cross-section conductor, the resistor) no effects on the current, the parallel resistor circuit is short circuited, current is infinite. If a resistor has an infinite or very large resistance, the circuit in which the resistor is connected can be seen as open circuit and zero current. Resistors commonly used in industry range between two extremes. They have a definite resistance and can pass through a certain current, but the current is not as large as a short-circuit. The limiting action of the resistor is similar to that of a small diameter pipe between two large diameter tubes that limit the flow of water. Resistor, English name resistance, usually abbreviated as "R". It is a basic property of conductors, related to the size, material and temperature of conductors. Ohm's law said, I=U/R, then R=U/I, the basic unit is the ohmic resistance, represented by the Greek letter Omega, there is such a definition: conductor plus one volt, which corresponds to one ampere of current resistance. The main function of resistance is to block current flow. In fact, "resistance" is a kind of property, and the resistance usually referred to in electronic products is a component such as resistors. Ohm is often referred to as ohm. The common units that indicate resistance values are also M, K, M.
Small power resistors are usually made of carbon films enclosed in plastic housing, while high-power resistors are usually wound resistors made by winding wires with large resistivity around the porcelain core.
