What Is The Difference Between Dc And Ac?


In direct current, the voltage is always constant, and the electricity flows in a certain direction. In contrast, in alternating current, the voltage periodically changes from positive to negative and from negative to positive, and the direction of the current also periodically changes accordingly.



Which is cheaper AC or DC?

Alternating current is cheaper to generate and has fewer energy losses than direct current when transmitting electricity over long distances.


What is better electricity AC or DC?

DC power is significantly more energy efficient than AC power. DC motors and appliances have higher efficiency and power to size characteristics. DC-based lighting (LED) is as much as 75% more efficient than incandescent lighting.


Why do we use AC instead of DC?

The main factor that went into the choice of AC over DC was that AC is more efficient. Its ability to travel back and forth made gave it the ability to travel over longer distances. Thus making it able to power more homes.


What is the difference between DC and AC?

In direct current, the voltage is always constant, and the electricity flows in a certain direction. In contrast, in alternating current, the voltage periodically changes from positive to negative and from negative to positive, and the direction of the current also periodically changes accordingly.


Is DC a battery power?

Your typical battery is powered by DC power, which is produced by a reaction of chemicals occurring inside the battery. DC power can also be produced and converted from AC power by a commutator, which is a device found in AC generators.


What is more common AC or DC current?

Both types of power are essential; one is not "better" than the other. In fact, AC dominates the electricity market; all power outlets bring power into buildings in the form of AC, even where the current may need to be immediately converted into DC power.


Can DC current shock you?

12 volts DC is not a shock hazard.

You can't touch the wires in your 120V AC household electrical system without getting a nasty, dangerous shock, but you can touch bare wires carrying 12V DC in your car, even lay your hands across the positive and negative 12V battery terminals, without risk of electrocution.


What is the passing score on the ic3?

IC3 Certification Exam Facts

Required exam:-Computing Fundamentals -Key Applications -Living Online
Number of questions:45 each exam
Length of test:45 minutes each exam
Passing score:-Computing Fundamentals 800 -Key Applications 750 -Living Online 660 (Scores out of 1000)
Exam code:GS4, GS5


What does IC3 mean in computer terms?

The Internet Core Competency Certification (IC3) is the worldwide benchmark to gauge a student's understanding of computer systems like hardware, software, firmware, networking, and computer literacy.


What are examples of digital literacy?

Examples of Digital Literacy

  • Understanding how to use web browsers, search engines, email, text, wiki, blogs, Photoshop, Powerpoint, video creation/editing software , etc. to showcase learning.
  • Evaluating online resources for accuracy/trustworthiness of information.


How do I get a digital fluency certificate?

Who can Get Certified ?

  1. Any citizen of India with low IT Literacy and with minimum 7th standard pass.
  2. Must be in the age group of 14 to 60 years.
  3. Should have completed minimum 20 hours training on the “Appreciation of Digital Literacy”
  4. Must have AADHAR Card Number to apply.


Dated : 09-Jul-2022

Category : Education

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