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

Qualification => Subject Doubts => GCE AS & A2 Level => Sciences => Topic started by: halosh92 on November 29, 2009, 06:24:51 pm

Title: physics doubts
Post by: halosh92 on November 29, 2009, 06:24:51 pm: physics AS
cie
2002 NOV paper 1
question 35. could anyone explain the answer plzz?
Title: Re: physics doubts
Post by: MaNi_DaDuDe on November 29, 2009, 06:43:28 pm: Quote from: halosh92 on November 29, 2009, 06:24:51 pm
physics AS
cie
2002 NOV paper 1
question 35. could anyone explain the answer plzz?

I think it is D.
I'm not sure why though..

You should wait for A-star or someone to explain.
Title: Re: physics doubts
Post by: halosh92 on November 30, 2009, 08:43:22 am: Quote from: MaNi_DaDuDe on November 29, 2009, 06:43:28 pm
I think it is D.
I'm not sure why though..

You should wait for A-star or someone to explain.

ya its is D but me neither have no idea y ???
Title: Re: physics doubts
Post by: astarmathsandphysics on November 30, 2009, 08:58:58 am: Let me switch my pc on.
Title: Re: physics doubts
Post by: nid404 on November 30, 2009, 10:51:46 am: It would be D...

If the resistance increases it leaves u with two options...B & D cuz N moves towards Y...larger length of the wire
If galvanometer has to have a zero deflection(minimum deflection), it means V(p.d)=IR will decrease
that is becuz Resistance is high...so Voltage decreases if current is very low

This is what I think.,...maybe some other reason...but from the basic knowledge i think this is what it is....astar may further clarify it
Title: Re: physics doubts
Post by: astarmathsandphysics on November 30, 2009, 11:50:07 am: thanks nid. so many probs this morning.
Title: Re: physics doubts
Post by: halosh92 on November 30, 2009, 02:47:50 pm: Quote from: nid404 on November 30, 2009, 10:51:46 am
It would be D...

If the resistance increases it leaves u with two options...B & D cuz N moves towards Y...larger length of the wire
If galvanometer has to have a zero deflection(minimum deflection), it means V(p.d)=IR will decrease
that is becuz Resistance is high...so Voltage decreases if current is very low

This is what I think.,...maybe some other reason...but from the basic knowledge i think this is what it is....astar may further clarify it

thank you so much :D very well explained!
Title: Re: physics doubts
Post by: nid404 on November 30, 2009, 04:21:14 pm: ur welcome :)