What is a resistor, a resistor (Resistor) is generally referred to as a resistor in daily life. Is a current limiting element, after the electrical blocking is in the circuit, the resistance of the resistor is fixed, which is generally two pins, which can limit the current size of the branch therebetween. The impedance resistor cannot be changed. The resistance variable is called a potentiometer or variable resistor. The ideal resistor is linear, that is, the instantaneous current of the resistor is proportional to the external transient voltage. Variable resistors for partial pressure. On the bare resistor, it is pressing one to two movable metal contacts. The contact position determines the resistance of the resistor or between the contacts.
What is resistor, end voltage and current have a functional relationship, reflecting electrical energy converting to other formal capabilities, using letter R, in ohmic Ω. The actual device such as bulb, electric heating wire, resistor, etc. can be expressed as a resistor element.
What is a resistor, the resistance value of the resistance element is generally related to temperature, material, length, and cross-sectional area, and the physical quantity of the temperature of the electric resistance is temperature is temperature coefficient, which is defined as the temperature per liter 1 ° C resistance value. Percentage of changes. The main physical characteristics of the resistor are thermal energy, which can also be said to be a energy consuming component, and the current can produce internal energy. The resistor usually sends a partial pressure and shunt in the circuit. For signals, the AC and DC signals can pass the resistance.