ECAT and MCAT Preparation: Post your doubts here!

[alphabravocharlie]

A charged particle moves through a magnetic field perpendicular to its direction. Then
(1) the momentum changes but the kinetic energy is constant
(2) both momentum and kinetic energy of the particle are not constant
(3) both, momentum and kinetic energy of the particle are constant
(4) kinetic energy changes but the momentum is constant

2 i think what is the answer?

http://www.pieas.edu.pk/admissions2012/Sample_Test_Paper_BS.pdf


question no. 28 here the ans of this matrix wil be o ???

as 1st and fourth rows are same?????

or are they not same????


and question no. 37 ans is D???? or else?

28: A
37: couldn't solve it so D

A ladder 5 m in length is resting against vertical wall. The bottom of the ladder is pulled along the ground away from the wall at the rate of 1.5 m/sec. The length of the highest point of the ladder when the foot of the ladder is 4.0 m away from the wall decreases at the rate of

(A) 2 m/sec (B) 3 m/sec

(C) 2.5 m/sec (D) 1.5 m/sec

first one, uhm B?
The generator one: C?

 

[Zaryab]

alphabravocharlie .. How did you solved the generator one ?

 

[alphabravocharlie]

alphabravocharlie .. How did you solved the generator one ?

Aoa wr wb
Uhm like this: I = Power/voltage = 10A
Power dissipated = I^2 x R = 10^2 x 5 = 500

 

[Zaryab]

Then why cannot we solve this question using V^2/R ?

 

[Goodfella]

is any of u attending some kind of preparatory classes from kips etc, or are preparing at home?

 

[alphabravocharlie]

Then why cannot we solve this question using V^2/R ?

Aoa wr wb
yeah, we can't use that, don't remember the reason [i think it was because we arte changing voltage at the start and end of transmission so it isn't constant throughout the transmission ], our sir told explained this to us that always use the I^2 x R formula when calculating the transmission losses

 

[hassam]

welll.......found some useful video lectures that closely matches fsc content
http://www.youtube.com/user/ExamFearVideos

 

[hassam]

welll.......found some useful video lectures that closely matches fsc content
http://www.youtube.com/user/ExamFearVideos

http://www.youtube.com/user/exponenteducation

 

[Goodfella]

Any notes for that sets chapeter in FSC part 1, it's way too confusing :/

 

[hassam]

Any notes for that sets chapeter in FSC part 1, it's way too confusing :/

yea exactly ....i also dint understood a word

 

[hassam]

well physics geometrical optics very important chapter from entry tests point of view

 

[leadingguy]

maths chaptr circles and and another chapter ellipse, parabola and hyperparabola are important fsc mathematic chapters not studied by an Alevel student. Limits also very important.

 

[Slash]

For A levels,In Physics u all should study

(Modern Physics)

(2nd law of T.D)

(projectile motion)

(work energy equations)

(diffraction in detail including some appartus (Newton rings,michelson's interferometer etc)

(Doppler's effect)

(Newton's formula for speed of sound with LApLace's corrections)

(combination of thin lenses, concave lenses, telescope,compound microscope)

Carnot engine ,carnot cycle

Charge densities on Gausian surface

Entropy

Parallel plate capacitor in detail

Effect of heat on resistors and resistance

some complex combinations of capacitors and resistors

Galvanometer's structure in detail

combination of Ammeter voltmeter with G.M

All electronics stuff, Band theory of conductors

Photo electric effect in detail and Einstein explanation of P.E effect

black body radiations

Compton effect,pair production and Annihilation of matter

De Broglie's Hypothesis

Binding Energy

Spectrum of Hydrogen

Mass defect problems

Nuclear Radiation (causes, uses, harms, detecting techniques..

These are all those main topics which are in Fsc and Federal Board but not in A levels
For other subjects , i will post soon if needed by u all.

 

[smzimran]

Slash:

JazakAllah for your help, yes please post more on other topics...

Thanx again, bro!

 

[Slash]

Above are not all the topics in Physics but main topics which are different...

 

[alphabravocharlie]

For A levels,In Physics u all should study

(Modern Physics)

(2nd law of T.D)

(projectile motion)

(work energy equations)

(diffraction in detail including some appartus (Newton rings,michelson's interferometer etc)

(Doppler's effect)

(Newton's formula for speed of sound with LApLace's corrections)

(combination of thin lenses, concave lenses, telescope,compound microscope)

Carnot engine ,carnot cycle

Charge densities on Gausian surface

Entropy

Parallel plate capacitor in detail

Effect of heat on resistors and resistance

some complex combinations of capacitors and resistors

Galvanometer's structure in detail

combination of Ammeter voltmeter with G.M

All electronics stuff, Band theory of conductors

Photo electric effect in detail and Einstein explanation of P.E effect

black body radiations

Compton effect,pair production and Annihilation of matter

De Broglie's Hypothesis

Binding Energy

Spectrum of Hydrogen

Mass defect problems

Nuclear Radiation (causes, uses, harms, detecting techniques..

These are all those main topics which are in Fsc and Federal Board but not in A levels
For other subjects , i will post soon if needed by u all.

Jazakallah
but can't do this in 2 days

 

[smzimran]

Jazakallah
but can't do this in 2 days

but...

NUST kelie zindabad!

 

[alphabravocharlie]

but...

NUST kelie zindabad!

true that

 

[Slash]

2 i think what is the answer?

28: A
37: couldn't solve it so D

first one, uhm B?
The generator one: C?

37: D

 

[hassam]

who is giving pieas test here???