One of the requirements of an elevator is high speed between floors, but a slow speed as it approached the floor, so that the floor levels are accurately aligned.
This is easy to organize with a DC motor.
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
Power lines carry electricity as alternating current.
Only a DC motor uses direct current, and the reason is that it is the only supply available. There are also plenty of AC motors used when there is an AC supply. DC tends to be used for low-power devices like fans in electronic equipment.
Direct current, as opposed to alternating current.
That depends on the type of thermistor Some solid state thermistors are only able to run on one correct polarity and so are direct current. Other thermistors designed as simple heat variable resistors can run on both direct current and alternating current.
Yes
direct
Yes. How do you think they run?
These things use dc: batteries provide direct current, so anything run by batteries; electrolysis, used for electroplating, aluminium manufacture and the production of sodium hydroxide.
Most televisions run on alternating current (AC) as it is the standard type of electricity supplied in homes. However, internally, TVs may convert AC to direct current (DC) for certain components to operate effectively.
The television runs on Direct current or DC. Though AC is applied, it is converted to DC and used by the television to operate.
direct current.
A car alternator generates alternating current, then uses a rectifier to convert the alternating current to direct current, it charges your battery and supplies the current to run all the electrical systems in the car.
An AC Adapter converts direct current into alternating current. It is handy when you only have 12 volt battery current and you need to use power tools which only run on alternating current.
A generator generates Direct current electricity An Alternator generate alternating current In a car this current is run through rectifiers or diodes to convert it into DC.
There is only one type of direct current and its 'frequency' is zero.