As physics p1 MCQS YEARLY ONLY.

[Thought blocker]

in q2 why is the answer C and not D??
in Q31 why is the ans D and not C?
IN q38 how do we know whether the speed of the electron will increase or decrease?

ZaqZainab
Hadi Murtaza

 

[Hadi Murtaza]

in q2 why is the answer C and not D??
in Q31 why is the ans D and not C?
IN q38 how do we know whether the speed of the electron will increase or decrease?

When u have 2 vectors, look at their ' x ' n ' y ' directions. If both point in 1 direction, then da resultant will also point in dat direction. If dey point in opposite directions, den da vector whose component is bigger will give da resultant direction.
So here both X n Y r pointing towards da right of P, so da resultant will also point towards da right of P

 

[Thought blocker]

When u have 2 vectors, look at their ' x ' n ' y ' directions. If both point in 1 direction, then da resultant will also point in dat direction. If dey point in opposite directions, den da vector whose component is bigger will give da resultant direction.
So here both X n Y r pointing towards da right of P, so da resultant will also point towards da right of P

LOL I know that, but 31 and 38 ._. ?

 

[ZaqZainab]

ZaqZainab

._. I am dumb
It will decreses though cause it move backwards as it was intially moving forward

 

[Catherine7532]

can u solve this plzzz??

 

[Thought blocker]

can u solve this plzzz??

 

[Catherine7532]

Q10????

 

[Thought blocker]

Q10????

momentum is conserved so it should remain as mv
now, principleof conservation of momentum. mv= 2m(v) bracketed v is unknown.
By calculation, unknown v would be half the original v, v/2.
KE= 1/2 2m (v/2)2
observe here, it is 2m not just m.
So answer is A.

 

[Catherine7532]

Q15 AND Q29 plzzzzzzzzz?

 

[Thought blocker]

Q15 AND Q29 plzzzzzzzzz?

15)
since torque is equal to force*distance,
the distance moved by the spindle will be the torque,
i.e L/4 means, WL/4 and will always be clockwise in this condition
P.S. this was a stupid question just remember the fact that the distance moved by
the spindle will be multiplied by the weight of the cube W.

29)
c = fλ
f = 1 / t
c = λ / t
t = λ / c
here we can see from the diagram that there are total of 3 wavefronts from XY to P
so, t = 3λ / c

 

[Catherine7532]

the force required to make the cube topple is in clockwise direction so shouldnt the force required to stop the cube from toppling be in anticlockwise direction???

 

[sweet life]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s13_qp_11.pdf
can anyone plz help me with ques 8,19,21,24.27,35
thank you soo much

 

[ratedr0014]

5,9,15,24,30,31,33,34 help please

 

[swdj24]

hey can u help me? thanks very much
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s13_qp_12.pdf#7,9,20,23,29,32,33,36

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s13_qp_13.pdf#15,16,19,29,31,34

 

[Dr.MMM]

Q1: A micrometer screw gauge is used to measure the diameter of a small uniform steel sphere. The micrometer reading is 5.00 mm ± 0.01 mm.
What will be the percentage uncertainty in a calculation of the volume of the sphere, using these values?

A 0.2% B 0.4% C 0.6% D 1.2%

Ans: C

Q2: An aeroplane travels at an average speed of 600 km h–1 on an outward flight and at 400 km h–1 on the return flight over the same distance. What is the average speed of the whole flight?

A 111 m s–1 B 167 m s–1 C 480 km h–1 D 500 km h–1

Ans: C

 

[Dr.MMM]

 

[Dr.MMM]

 

[m1a2h3]

nov 13 variant 13 question 38,34,36.
help please

 

[Zepudee]

A beam of α-particles collides with a lead sheet. Each α-particle in the beam has a mass of
6.6 × 10–27 kg and a speed of 1.5 × 107
m s–1.

5.0 × 104
α-particles per second collide with an area of 1.0 cm2
of lead. Almost all of the
α-particles are absorbed by the lead so that they have zero speed after collision.

What is an estimate of the average pressure exerted on the lead by the α-particles?
A 5.0 × 10–15 Pa
B 5.0 × 10–13 Pa
C 5.0 × 10–11 Pa
D 5.0 × 10–9 Pa

ANS: C

 

[Thought blocker]

I request you all.. to post your doubts in physics thread... PLEASE Physics post your doubts here thread!