Physics O levels complete discussion

[17194]

http://www.xtremepapers.com/papers/...nal O Level/Physics (5054)/5054_s11_qp_12.pdf
mcq 37 help

A frequency of 0.5Hz means the time period is, T=1/F, T =1/0.5, T=2s. Since there is 1.5 waves shown on the screen time taken is = 1.5x 2 (period) = 3s

 

[M Haseeb Javed]

3s?

its correct but whats the method?

 

[17194]

I just posted it.

 

[M Haseeb Javed]

A frequency of 0.5Hz means the time period is, T=1/F, T =1/0.5, T=2s. Since there is 1.5 waves shown on the screen time taken is = 1.5x 2 (period) = 3s

cool!

 

[M Haseeb Javed]

EMF is realted to nonelectric energy changing to electric energy (e.g. voltage of a battery)
P.D. is realted to electrical energy converted to nonelectric energy.

hope that helped.
btw in O levels mostly u don't need to differentiate b/w the two bcuz they use a cmbined word (VOLTAGE) for the both of them.

The simple and effective definition is:
EMF: The amount of energy converted to electric enerygy from other forms per unit charge.
Voltage/p.d: The mount of energy converted from electric energy to other forms per unit charge.

These def are not like official but they clear the doubt

 

[Muhammad TAimoor]

i guess its 6s

It says that 0.5 Hz is the frequency. So you first need to find the time period which is f=1/T. In this case u have frequency so time period will be T=1/0.5. ans would be 2sec. By looking at the graph, one and a half wave is produced so for one wave, u get 2 secs and for half, its 1 sec. So the answer would be 2+1=3secs. Confusing!

 

[Muhammad TAimoor]

http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Physics (5054)/5054_s11_qp_12.pdf
mcq 37 help

It says that 0.5 Hz is the frequency. So you first need to find the time period which is f=1/T. In this case u have frequency so time period will be T=1/0.5. ans would be 2sec. By looking at the graph, one and a half wave is produced so for one wave, u get 2 secs and for half, its 1 sec. So the answer would be 2+1=3secs. Confusing!

 

[kitecrystal]

what is linear magnification?

 

[convent2012]

linear mag = image height / object height

 

[Fallen316]

what is linear magnification?

image height/object height
OR
image distance/object distance

 

[kitecrystal]

image height/object height
OR
image distance/object distance

thanku

 

[kitecrystal]

t

linear mag = image height / object height[/quote
thanks

 

[convent2012]

t

np

 

[daredevil]

The simple and effective definition is:
EMF: The amount of energy converted to electric enerygy from other forms per unit charge.
Voltage/p.d: The mount of energy converted from electric energy to other forms per unit charge.

These def are not like official but they clear the doubt

what i wrote was pretty much the same but stilll thanks.

 

[Fallen316]

this is the only method you will ever need to learn . And i solved all questions of pp's through this

CLICK LIKE IF IT HELPED !

 

[daredevil]

Here are a few questions that i came across:

Q1- Why is the stem of a thermometer often oval in cross section?

Q2-Which of the following statements about alpha particles is not true?
A. they can be deflected by magnetic field
B. they can be deflected by electric fiel
C. they can be detected by spark counter
D. they are radioactive
(first tell me ur answer then i'll tell the correct answer )

Q3-State 2 precautions u should take wen using vernier calipers. (except zero error)

Q4-State 2 precautions u shud take wen using a micrometer screw guage (except zero error)

Please answer asap!!

 

[Fallen316]

Here are a few questions that i came across:

Q1- Why is the stem of a thermometer often oval in cross section?

Q2-Which of the following statements about alpha particles is not true?
A. they can be deflected by magnetic field
B. they can be deflected by electric fiel
C. they can be detected by spark counter
D. they are radioactive
(first tell me ur answer then i'll tell the correct answer )

Q3-State 2 precautions u should take wen using vernier calipers. (except zero error)

Q4-State 2 precautions u shud take wen using a micrometer screw guage (except zero error)

Please answer asap!!

1) it acts as a magnifying glass to read the temperature
2)B
3) and 4)
1. i dont know, maybe , make sure it works
2.check for parallax error
* isn't this an atp question ? 3 and 4 ?

 

[kitecrystal]

Here are a few questions that i came across:

Q1- Why is the stem of a thermometer often oval in cross section?

Q2-Which of the following statements about alpha particles is not true?
A. they can be deflected by magnetic field
B. they can be deflected by electric fiel
C. they can be detected by spark counter
D. they are radioactive
(first tell me ur answer then i'll tell the correct answer )

Q3-State 2 precautions u should take wen using vernier calipers. (except zero error)

Q4-State 2 precautions u shud take wen using a micrometer screw guage (except zero error)

Please answer asap!!

1.to magnify the readings of scale.
2.C(am i right?)
for 3 and 4,eye should be perpendicular to reading scale(avoid parallex error)

 

[17194]

1) it acts as a magnifying glass to read the temperature
2)B
3) and 4)
1. i dont know, maybe , make sure it works
2.check for parallax error
* isn't this an atp question ? 3 and 4 ?

alpha particles are deflected by electric fields.

 

[Fallen316]

alpha particles are deflected by electric fields.

oh, damn. its D.