IGCSE/GCSE/O & A Level/IB/University Student Forum

Student Forum => Introductions => Topic started by: muzxx on July 16, 2010, 07:40:42 pm

Title: Intro
Post by: muzxx on July 16, 2010, 07:40:42 pm

hii (or asalaam).. am new to this forum. am muz. am 16 and am sitting for the cambridge O-level exam.
 i have some problem to differentiate between a 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. i would also like to make new friends who can share views about our studies.

Title: Re: Intro
Post by: DrEvil on July 16, 2010, 07:48:29 pm

Welcome to SF!

Post your problems in GCE - O Level board and I'll love to help you out.  :)
https://studentforums.biz/gce-o-level/

Title: Re: Intro
Post by: Saladin on July 17, 2010, 01:07:36 am

Hiya! Welcome!

Title: Re: Intro
Post by: $tyli$h Executive on July 17, 2010, 02:17:24 am

Hi. Have fun. :)

Title: Re: Intro
Post by: M-H on July 17, 2010, 08:09:50 am

hey!!! great to have u here!!

look thru the stuffs in gce o level...if u still dont find nething useful..ask us, we'll help!
take care good luck :)!

Title: Re: Intro
Post by: The Golden Girl =D on July 17, 2010, 09:29:35 am

Welcome to the forum ;)

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

I hope i helped :) ...ohh and if u got any further Qs then i suggest u post here :

https://studentforums.biz/igcse-subjects-doubtshelp/all-physics-igcse-doubts-here-!!/

Title: Re: Intro
Post by: DrEvil on July 17, 2010, 10:19:25 am

Quote from: ~ the Golden girl ~ on July 17, 2010, 09:29:35 am

I hope i helped :) ...ohh and if u got any further Qs then i suggest u post here :

https://studentforums.biz/igcse-subjects-doubtshelp/all-physics-igcse-doubts-here-!!/

He is a GCE - O Level student not IGCSE... :P

Anyways thanks for the help.

+ Rep.  :)

Title: Re: Intro
Post by: The Golden Girl =D on July 17, 2010, 11:56:29 am

haha lol , well when i saw the word * Cambridge * that's the first thing that came to my mind lol