AC FULL FORM
Full Form of AC : Alternating Current
What is the full form of AC?
No:1. AC stands for Alternating Current.
No:2. It refers to a current in which movement of electric charge changes direction periodically.
No:3. In other words, alternating current changes its direction and magnitude periodically, i.e., it starts from 0 grows to maximum, returns to 0 and again grows to the maximum in the opposite direction and then again reaches to original value 0.
No:4. This cycle is repeated continuously as long as the AC is flowing in the circuit.
No:5. Alternating Current is different from direct current (DC) as DC flows only in one direction.
No:6. The generation and transmission of AC are very easy as compared to DC.
No:7. So, it is the AC that is used in mains-wired buildings such as homes, offices, factories and other buildings.
No:8. AC is also used in electric motors that convert electric energy into mechanical energy.
No:9. Electric motors are present in various electrical appliances like washing machines, refrigerators, etc.
Alternating Current Production
No:1. AC can be generated by using devices that are known as alternators.
No:2. However, there are also different methods to generate AC by using various circuits.
No:3. Besides this, one of the easiest ways to produce AC is by using a single coil AC generator that comprises two-pole magnets and a single loop of rectangle-shaped wire.
No:4. In this method, AC is produce based on Faraday’s principle of electromagnetic induction in which mechanical energy is convert into electrical energy.
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Advantages of Alternating Current I Advantages of AC over DC
No:1. AC can be transmitted over long distances using step up transformers but DC cannot be transmitted like this.
No:2. It is cheap and easy to generate and transmit AC than DC.
No:3. The efficiency of the AC generator is higher than DC.
No:4. The loss of power while transmitting AC is very less.
No:5. AC can be convert into DC.
No:6. The magnitude of AC can be decrease without losing much energy.
No:7. Brushes are require in DC motors to make electrical contact with moving coils of wire whereas AC motors do not need it.
No:8. AC causes less disturbance in the nearby communication wires such as telephone lines.
No:9. It is suitable for domestic and industrial applications.
No:10. Besides this, in the AC machine and transformer, the loss of iron and copper is low as alternating current improves the efficiency of AC machines.
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Important MCQ’s
Que.-1.’मोतियों का द्वीप’ किसे कहा जाता है?
(a) श्रीलंका
(b) बहरीन
(c) जापान
(d) सिंगापुर
Ans : (b) बहरीन
Que.-2.भारत की सीमाएँ कितने देशों के साथ जुड़ी है ?
(a) 5
(b) 6
(c)7
(d) 9
Ans : (c)7