- Messages
- 27
- Reaction score
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- Points
- 13
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sorry Ally Emran, I did not quite understand the explanation to question 40 , could u explain it in simpler terms?np
For 30:
A. The circuit would still work if the earth wire is not connected
B. Again the circuit would still work because The fuse would not bblow up as current is circuit is very low
C. Lamps can work on a.c too
D. The current move from live wire. when it is not connected, circuit would not work as no current would be present in the circuit
For 40:
U can use Fleming left hand law: Index finger pointing in the paper, middle finder opposite of direction of radioactive source and thumb finger to the left and the beta particles are deviated at shor distance as compared to alpha and gamma doesnot deviate
sorry Ally Emran, I did not quite understand the explanation to question 40
np
For 30:
A. The circuit would still work if the earth wire is not connected
B. Again the circuit would still work because The fuse would not bblow up as current is circuit is very low
C. Lamps can work on a.c too
D. The current move from live wire. when it is not connected, circuit would not work as no current would be present in the circuit
For 40:
U can use Fleming left hand law: Index finger pointing in the paper, middle finder opposite of direction of radioactive source and thumb finger to the left and the beta particles are deviated at shor distance as compared to alpha and gamma doesnot deviate
Nope, see the question again I think you are mixing the detector and the sourcemiddle finger should be from down to top !?!?! i guess so
well, for everyone his own methodfor thumb direction <----
for mid finger direction ^
|
for index one= inside the paper
USING LEFT HAND LAW! Actually i got the correct answer using this method!! Every time
Right Hand Rule is correct but it would create confusion especially for me :/
yes, it is used to find the direction of force acting on a current carrying wire when a current carrying wire is placed in a magnetic field... and in the left hand rule, isn't the middle finger used to find the direction of current or is it used to find the "direction of the moving particles"?u know the fleming left hand rule?
use the left hand rule here too, just for your own helpyes, it is used to find the direction of force acting on a current carrying wire when a current carrying wire is placed in a magnetic field...
OMG!!!! I just understood!!!! thanks so much Usama321 and Ally Emran... so what exactly is the principle/law used here called as aren't the left and right hand rules used for electromagnetic induction? And Usama321 , the right hand rule doesn't actually work for this-only left hand does- or do both work?but then, why can't the answer be alpha particles and also how is the direction of the particles from the top to the bottom? :/ do the particles move from radioactive source to detector?
All my MCQ doubts...
1. June 2007 Q.23
2.June 2008 Q.8
3.June 2008 Q.17
4.June 2008 Q.23
5.June 2008 Q.30
6. June 2010 paper 11 Q.34
7.June 2012 paper 11 Q.8
8. November 2012 paper 11 Q.3
9.November 2012 paper 11 Q.18
10.November 2012 paper 11 Q.26
Would really appreciate if any one could explain me the answers to these questions ASAP as I have an upcoming Physics test...
In the coming oct/november 2013 session... btw are u like gud at other subjects as well like eco?as long as im not bored of XPC you can ask and when you are gonna appear fo the cies??
hahanah! I am just good in ICT and i opted for commerce not eco
no, as in which school r u frmahan great! I have finished my O Levels
nope ttyl* in which school u were?
anyway i did o levels from Lahore Grammar School, Lahore ! Have u given some of cie papers before?
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