A2 Physics | Post your doubts here

[princesskt]

5*235*(1240-300)+(5*105*10^3)+(5*235*100)=95*129*(x-1340)
solve it..........
heat gain by silver=heat loss by gold

 

[Mobeen]

Q1 c part 1 (Electric field)
Q2 b part 3 (complete the table)

 

[princesskt]

5*235*(1240-300)?(5*105*10^3)+(5*235*100)=95*129*(x-1340)
solve it
heat gain by silver=loss by gold
hope u understand?

 

[Aahliya]

Anyone who can explain me this.. ??

http://www.xtremepapers.com/papers/...and AS Level/Physics (9702)/9702_s08_qp_4.pdf

Q11
a(ii)A sinusoidal carrier wave has frequency 500 kHz and amplitude 6.0 V. It is to be
frequency modulated by a sinusoidal wave of frequency 8 kHz and amplitude 1.5 V.
The frequency deviation of the carrier wave is 20 kHz V^–1

Describe, for the carrier wave, the variation (if any) of
1. the amplitude,

2. the frequency.

 

[SkyPilotage]

Anyone who can explain me this.. ??

http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s08_qp_4.pdf

Q11
a(ii)A sinusoidal carrier wave has frequency 500 kHz and amplitude 6.0 V. It is to be
frequency modulated by a sinusoidal wave of frequency 8 kHz and amplitude 1.5 V.
The frequency deviation of the carrier wave is 20 kHz V^–1

Describe, for the carrier wave, the variation (if any) of
1. the amplitude,

2. the frequency.

1. In frequency modulation, amplitude doesnt change!
2. When the signal is negative, the frequency lower limit is 500 - 30 Hz= 470 Hz
When signal is positve, the frequency is 500 + 30 Hz = 530 Hz
The frequency of the modulating wave means that the frequency changes from the upper limit to the lower limit to the upper limit again is 8000 times per second!
Solve Q11 Novemeber 2009 qp_42 , you will understand better.

 

[Aahliya]

1. In frequency modulation, amplitude doesnt change!
2. When the signal is negative, the frequency lower limit is 500 - 30 Hz= 470 Hz
When signal is positve, the frequency is 500 + 30 Hz = 530 Hz
The frequency of the modulating wave means that the frequency changes from the upper limit to the lower limit to the upper limit again is 8000 times per second!
Solve Q11 Novemeber 2009 qp_42 , you will understand better.

thanks dear ..

 

[namename]

Can you please check whether this is correct?
s02 £ 6 (I/t and induced E/t graph)

 

[namename]

Conducting diode?
the ms doesn't specifically say which ones are correct.
are those I circled the correct ones?

 

[umarashraf]

Conducting diode?
the ms doesn't specifically say which ones are correct.
are those I circled the correct ones?

yes... u r right mate...

 

[doc.ahmed]

Anyone who can explain me this.. ??

http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s08_qp_4.pdf

Q11
a(ii)A sinusoidal carrier wave has frequency 500 kHz and amplitude 6.0 V. It is to be
frequency modulated by a sinusoidal wave of frequency 8 kHz and amplitude 1.5 V.
The frequency deviation of the carrier wave is 20 kHz V^–1

Describe, for the carrier wave, the variation (if any) of
1. the amplitude,

2. the frequency.

i would suggest you that an awesome explanation on this question is given in mike crundell.. Its exactly the sane question just values are diffrent.. have a look at it

 

[Dayyanah]

Q1 c part 1 (Electric field)
Q2 b part 3 (complete the table)

Yes im stuck there too, pls help

 

[Zishi]

Can you please check whether this is correct?
s02 £View attachment 8767 6 (I/t and induced E/t graph)

IT should be like as shown in my attachment.

 

[arlery]

IT should be like as shown in my attachment.

but according to

0.999 = 1
so which video is correct? :S because they both seem to contradict each other.

 

[SkyPilotage]

Guys this link will help you with different types of damping. especially Q2a ii) June 2012 qp_42. Only light damping is in our syllabus I guess.
http://www.miniphysics.com/2010/11/damping.html

 

[imagine]

I have difficulty in understanding principles of MRI and the explaining the reason for the graph of X-rays... help me!

 

[Zishi]

but according to

0.999 = 1
so which video is correct? :S because they both seem to contradict each other.

It was an April Fools' video.

 

[princesskt]

plz make it clear every one which graph is correct?from the above two of emf from V vs d?

 

[namename]

IT should be like as shown in my attachment.

Thanks but what is the concept behind it??

 

[hassam]

Thanks but what is the concept behind it??

its that e.m.f is -ve d(phi)/dt

 

[hassam]

Guys this link will help you with different types of damping. especially Q2a ii) June 2012 qp_42. Only light damping is in our syllabus I guess.
http://www.miniphysics.com/2010/11/damping.html

thanks brother....t.here was one question in which i cnsidered it to be heavy bt ms said light....bt now understtodd that heavy means no oscillation will occur after force is applied