What is electric current and what are the conditions of its existence
What is electric current and how does it arise. Conditions for the flow of electric current in metals, semiconductors, gas and liquid. A simple explanation of the concept.
Using an external laptop battery
Found an external battery for laptops. He gives out 3A at 19V. And on my laptop it says 19V, 4.74A. Will the laptop even turn on from this battery?
Is it possible to determine the manufacturer of the wire by marking?
Is it possible to identify the manufacturer by marking the wire (or in some other way)? Thank!
Which circuit breaker, starter and thermal relay should I choose for an 11 kW engine?
Which automatic machine, magnetic starter and thermal relay for an 11 kW induction motor?
Voltage on armor and ground wire in 5-wire cable
I connected the VVGNG cable, yellow-green and armor are not connected. With a call, it turned out that on the armor there are 40-50 Volts, and on PE about 70 Volts. This is normal?
Which RCD should I choose if the load is 5 kW?
I want to put an RCD on 2 machines, the load on them will be a maximum of 5 kW. What should I choose an RCD by power and which machines to put? Do you need RCD protection or not?
How many computers can be connected to one outlet?
Hello, how many computers (system units + monitor) can be connected to 1 outlet? Power supplies 550w, ordinary prefabricated house, built in 1994.
Overview of the robot vacuum cleaner Wolkinz Cosmo
Overview of the new Wolkinz Cosmo robot vacuum cleaner. Characteristics and functionality of the model. Pros and cons of Wolkinz Cosmo.
Which automatic machine should I put on a 2.5 square copper cable?
Hello! What to choose an introductory machine for the garage, in which copper wiring, cable cross-section of 2.5 mm.kv.?
Is there a sensor in nature that turns on and off the light when crossing the line?
Is there such a device in nature when crossing, say, a conditional line, the light would be ignited and also turn off? I would like to create a so-called barrier.
