What are the basic characteristics of wire resistance strain gages?
The terminal voltage and the current have the definite function relation, which shows the two terminal device which can transform the electric energy into other forms. It is represented by the letter R, and the unit is ohm. Actual devices, such as light bulbs, electric heating wires, resistors, etc., can be represented as resistor elements.
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. Variable resistor for partial pressure. One or two removable metal contacts are tightly pressed on exposed resistors. The contact position determines the resistance between any end of the resistor and the contact point.
The resistance value of the components size and temperature, material, length and cross-sectional area, the measure of the size of the resistance is affected by temperature is the temperature coefficient of resistance value, which is defined as the percentage change in temperature rise every 1 degrees. The main physical characteristic of resistance is that the electric energy is heat, and it is also a component of energy dissipation. Resistance usually acts as a divider and shunt in a circuit. For signals, AC and DC signals can be passed through resistors.
Resistors (Resistor) are commonly referred to as resistors in everyday life. It is a current limiting element. After the resistance is connected to the circuit, the resistance value of the resistor is fixed, usually two pins, which can limit the current size of the branch through it.
