Showing posts with the label DC current

Every LI-PO battery User should know

LiPo batteries are generally safer and more environmentally friendly than other R/C batteries like …

Why is voltage dropped from 220V to 185V?

Distance plays in part as the resistance of the wire increases with it’s length. I will assume bein…

Why is the resistance of DC equal to resistance of AC?

Resistance to AC is only the same as DC in a purely resistive circuit. Something like a heating ele…

Why do you disconnect the negative first in car battery?

You should be a bit more specific. Negative what, and where? It’s possible you’re talking about a c…

Why do we use Aluminum to substitute Copper in transmission lines?

Aluminum is very close to the conductivity of copper, about 1.6 times as much resistance per foot f…

why don't big airplanes use DC electricity?

There are two problems with DC that are rarely discussed but very important. 1 - Electric arcs. I…

Why don't we use DC supply in our homes?

Thomas Edison thought we should use DC. Nikola Tesla thought we should use AC. There was a great …

What is solar energy? and Why is it useful?

Solar energy is a combination of the hours of sunlight you get at your site and the strength of tha…

Understanding Measuring Volts and Amps in electrical cable and device

The type of instrument to be purchased for general use in the electrotechnical industries is a diff…

Do smartphone Android charger cords lose their effectiveness over time?

To put it bluntly, USB cables do wear out, regardless of the device's operating system. And tha…

Why the most of telecom equipment use -48 DC Voltage?

The voltage is negative to ground because that polarity was found to minimize electrolytic corrosio…

How many DC voltage safe for humans to touch?

You know what kills you is the current that flows through affecting your heart, not the voltage. B…

What is Protective electrical bonding to earth?

The purpose of the bonding regulations is to keep all the exposed metalwork of an installation at t…

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