Knowledge

If a resistor has a resistance value close to zero ohms (e.g., a large cross-section wire between two points), the resistor has no resistance to current flow

In an ideal resistor, the resistance value would not change with voltage or current, nor would it change due to sudden changes in current.

Discrete small resistors are still widely used, but will further reduce the size, improve performance, and reduce prices

For fixed resistors, first check that the signs are clear, the protective paint is intact, no scorch, no scars, no cracks, no corrosion, and the resistor body is in close contact with the pins.

The resistance should be checked before use. To check its performance is to measure whether the actual resistance value is consistent with the nominal value and whether the error is within the allowab

Choose resistors that perform to a high standard from a production line certified by an accreditation body.

Wire-wound resistors are made of high-resistance alloy wires wound on an insulating skeleton, and are coated with a heat-resistant glaze insulating layer or insulating varnish.

Within the specified ambient temperature range, the average relative change of the resistance value when the temperature changes by 1°C, expressed in ppm/°C.

The rated power of the resistor refers to the maximum power that the resistor is allowed to consume in a DC or AC circuit for long-term continuous operation.

A two-terminal electronic component made of resistive material with a certain structural form that can limit the flow of current in the circuit.

Resistors are generally called resistors directly in daily life. It is a current limiting component.

The process of charging a capacitor (storing charge and electrical energy) is called charging.