How many types of resistors are there and what are their properties and functions? What is a non-pure resistive circuit?

How many types of resistors are there and what are their properties and functions? In 1841, British physicist James Joule discovered that the amount of heat Q (called Joule's heat) generated in a current-carrying conductor is proportional to the square of the current I, the resistance R of the conductor and the time t of energisation, so the law is known as Joule's law. In 1842, the Russian physicist Heinrich Lundji also independently discovered the law, hence the name "Joule-Lundji's Law".

The heating wire of an electric stove is in fact an electrical resistance, and the stove can be considered a purely resistive circuit, where all the electricity is generated.

The electrical resistance has a characteristic: it consumes electrical energy and generates all the heat.

So where do you want all the electricity consumed to be heated up?

Rice cookers, water heaters, electric irons, electric ovens, electric soldering irons, electric heaters, heaters, etc.

What quantitative law does electrical resistance follow for heat generation

It follows Joule's law or the Joule-Flutters law.

Q = (I^2)Rt or P = (I^2)R;

where Q (heat in joules), I (current in amps), R (resistance in ohms), t (time in seconds) and P (thermal power in watts).

What is a non-pure resistance circuit

For example, in an electric motor (motor), not only does the coil generate heat (resistive heat), it also converts electrical energy into mechanical energy and drags the load around, at which point the motor is not a purely resistive circuit and not all of the electrical energy consumed by the motor is generated.

More News

What are the components commonly used on circuit boards? What do they do?

2022-07-28

Are resistance dividing and resistance bucking the same? Difference between resistor divider and resistor step-down

2022-07-28