« previous next »
Pages: [1]   Go Down

Author Topic: physics doubts  (Read 1047 times)

Offline halosh92

  • SF Senior Citizen
  • *****
  • Posts: 730
  • Reputation: 1113
  • Gender: Female
    • meticulous-me
physics doubts
« on: November 29, 2009, 06:24:51 pm »
physics AS
cie
2002 NOV paper 1
question 35. could anyone explain the answer plzz?
Logged
everyday we wake up is a miracle, then how do we say miracles dont happen?????

Offline MaNi_DaDuDe

  • Don't use profanity, it makes you seem uneducated.
  • SF Farseer
  • *******
  • Posts: 3383
  • Reputation: 65510
  • Gender: Male
  • uh, ef you?
    • Team siCk
Re: physics doubts
« Reply #1 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.
Logged

Offline halosh92

  • SF Senior Citizen
  • *****
  • Posts: 730
  • Reputation: 1113
  • Gender: Female
    • meticulous-me
Re: physics doubts
« Reply #2 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 ???
Logged
everyday we wake up is a miracle, then how do we say miracles dont happen?????

Offline astarmathsandphysics

  • SF Overlord
  • *********
  • Posts: 11271
  • Reputation: 65534
  • Gender: Male
  • Free the exam papers!
Re: physics doubts
« Reply #3 on: November 30, 2009, 08:58:58 am »
Let me switch my pc on.
Logged

nid404

  • Guest
Re: physics doubts
« Reply #4 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
Logged

Offline astarmathsandphysics

  • SF Overlord
  • *********
  • Posts: 11271
  • Reputation: 65534
  • Gender: Male
  • Free the exam papers!
Re: physics doubts
« Reply #5 on: November 30, 2009, 11:50:07 am »
thanks nid. so many probs this morning.
Logged

Offline halosh92

  • SF Senior Citizen
  • *****
  • Posts: 730
  • Reputation: 1113
  • Gender: Female
    • meticulous-me
Re: physics doubts
« Reply #6 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!
Logged
everyday we wake up is a miracle, then how do we say miracles dont happen?????

nid404

  • Guest
Re: physics doubts
« Reply #7 on: November 30, 2009, 04:21:14 pm »
ur welcome :)
Logged
Pages: [1]   Go Up
« previous next »