Thomas Edison used direct current in his electric power transmission in the 1800's.
This isn't very relevant, but it is "Quite Interesting"
From QI--Elephant in the Room: In 1903, Thomas Edison made a film called Electrocuting an Elephant, in which he used an alternating current to kill an elephant called Topsy. He used the film as a Propaganda film to destroy the reputation of alternating current, owned by Westinghouse, believing his direct current was safer. He tried to encourage people to call being electrocuted, "Westinghoused".
Alternating current. Direct current is used in batteries.
Simple source of direct current are Batteries.
DC or Direct Current. The current is no alternating.
-- There's no such thing as 'indirect' current.-- Direct current has no frequency. As soon as you mention 'frequency',you're talking about alternating current.
we can use ammeter for current checking
No one discovered it, it was invented.
No one discovered it, it was invented.
DC, or Direct Current, was not invented in the traditional sense as it is a very simple and common way to transfer power through a conductor. Far too common to pinpoint the first person who discovered it. Thomas Edison developed direct current, but it was only with Nikola Tesla's help that Edison ever developed any useful generators for direct current. It's odd that we credit Edison with inventing the light bulb AND direct current when Nikola Tesla is to direct current what Edison is to the light bulb.
direct current.
The word "electricity" is the direct object in the sentence "Who discovered electricity?" The direct object receives the action of the verb, which in this case entails what was being discovered.
There is only one type of direct current and its 'frequency' is zero.
direct current
Alternating current. Direct current is used in batteries.
direct current
He discovered the power of electricity, invented the light bulb, developed theories about DC (direct current), and proved the dangers of AC (alternate current).
Alternating current is better than direct current for transmission.
Volts direct current eg battery As opossd to Vac wich is volts altinating current eg mains supply