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AS Physics P1 MCQs Preparation Thread.

m.r92

m.r92

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hey guys, anyone remember which paper that question about emf was in that involved kirchoff's second law, and the answer was E-I1r1 - I2R2 -I3...something? :p any help is appreciatd
 
umarashraf

umarashraf

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MysteRyGiRl

MysteRyGiRl

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umarashraf said:
kheir... proton number will increase by 1 as an electron is emited... so new configuration will have now 4 protons... and the have asked neutrons.. not nucleon number... no. of neutron will be 8-4=4.. so option A has to be the correct one..
Click to expand...
ohk thnx :)
 
m.r92

m.r92

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and did you guys memorise the frequencies of the electromagnetic spectrum? or just the wavelengths?
 
Capricedcapri

Capricedcapri

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R
m.r92 said:
and did you guys memorise the frequencies of the electromagnetic spectrum? or just the wavelengths?
Click to expand...
Ronald McDonald is very ugly xcept Gary....( rMIVUXG) .....as wavelengths decreases from radio waves to gamma waves so their wave lengths are.... 10 power plus 2 ,10 power -2 ,10 power -4 ,10 power -6 ,10 power -8 ,10 power -10 and 10 power -12 ...
 
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geek101

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Capricedcapri said:
Any one plz explain 22 mcq of may June 2003!!
Click to expand...

In the scenario given, each of the springs extents by x, and each gets a share of 1/3 W (F)
so put it in the equation F = kx, itll be 1/3F = k x
k = F/3x (this will be the k for all the springs since they are the same)
now in the next case....the remove one spring and double the W
so now each spring gets 1W (F)
substitute k with the value you found before
F = (F/3x) extension
extension = F / (f/3x) = 3x , tadaa!
 
Capricedcapri

Capricedcapri

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geek101 said:
In the scenario given, each of the springs extents by x, and each gets a share of 1/3 W (F)
so put it in the equation F = kx, itll be 1/3F = k x
k = F/3x (this will be the k for all the springs since they are the same)
now in the next case....the remove one spring and double the W
so now each spring gets 1W (F)
substitute k with the value you found before
F = (F/3x) extension
extension = F / (f/3x) = 3x , tadaa!
Click to expand...
Wao! That was easy....after u explained...thanks a lot genius!!: D
 
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malik234

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bloody_mary said:
Q 2
you have horizontal component 20 and angle 30 so use tan
tan 30 = x/20 x =11.5

Q10
well first right what we will now
so X: 0.5mv^2=E
and Y: has 0.5*2m*l^2 (l is the speed because it can't be same as X has)
since it is an explosion they both have same KE so will try to find l for Y
so l= sqrt(E/m)
v= sqrt(2E/m) now divide l by v so we get l is sqrt(0.5)*v

no put l back in equation for Y and we get 0.25mv^2
and X will be 0.5mv^2

now divide X by Y to get 2/1

Q11
answer is A because P has to be less than R for upthrust to take place and S+ Q play no role in upthrust so are equal

Q14
answer is C
first find units of K from F/V^2 which is kg/m

then compare it with answer to get C
Click to expand...
thanku
 
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