Qualification > Sciences
IGCSE PHYSICS DOUBTS HERE !!!!
HUSH1994:
it is ac\dc motors,generators,these are the hardest things i ever studied :S
elemis:
--- Quote from: HUSH1994 on August 14, 2010, 11:04:33 am ---it is ac\dc motors,generators,these are the hardest things i ever studied :S
--- End quote ---
HAHAHAHAHA !!!! :D
You dont know the meaning of hard. Wait till you get to A- Levels. Your gonna have a mental workout that will leave you brain dead. :P
Nah, just kidding..... or am I ? :P
To be honest, AC Generators and DC motors are hard to understand at first - you just got to find a good image to look at. ;)
The Golden Girl =D:
--- Quote from: HUSH1994 on August 14, 2010, 11:04:33 am ---it is ac\dc motors,generators,these are the hardest things i ever studied :S
--- End quote ---
I have explained a part of it to a member earlier , here u go :
D.C motor and an A.C generator. i do not understand the formula and have still not get an appropriate and concise explanation of the magnetic fields concerning them and how the rotate continuously.
ans: 1. MOTOR changes electric energy to kinetic while GENERATOR changes kinetic energy to electric.
2. D.c motor has got a circuit connected to it that has a battery in it while the generator has a circuit connected to it which has got anythin BUT a battery *ex : lamb or voltmeter ...etc*
3. The current in the motor is DC meaning a direct current cuz BATTERIES allow only direct current to pass ,while the generator has got somthin called slip rings which allows the wires to rotate freely in both clockwise and anticlockwise which produces an AC current .
4. You use the right hand rule for GENERATORS and the left hand rule for MOTORS
The Golden Girl =D:
--- Quote from: HUSH1994 on August 14, 2010, 11:04:33 am ---it is ac\dc motors,generators,these are the hardest things i ever studied :S
--- End quote ---
mafi shai isma AC/DC MOTOR !!! .......il MOTOR is DC wi bas ...lakin il generator fi minu AC o fi DC ;)
I'll try my best ot explain just gimme some time :)
elemis:
DC Motors - require a Split Ring
AC Generator - require a Slip Ring NOTE: You dont need to know about AC motors or DC generators.
DC Motors - Electrical Energy---> K.E.
AC Gen - K.E ----> Electrical Energy
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DC MOTOR - Why do you need a SPLIT RING ?
Every half turn the gaps in the Split ring are in line with the carbon brushes such that the current stops flowing. Due to its momentum the coil continues to turn until the carbon brushes have reversed contacts such that the current flows in the opposite direction.
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