Physics 9702 P21

[cookiemonster96]

Did someone get 0.04m as the wavelength?
I got 6.25 waves for 25cm length drawn in the figure. :/

Yup. I believe that is correct

 

[Autumngirl]

Yup. I believe that is correct

I saw exactly 6 waves between the dotted lines

 

[cookiemonster96]

I saw exactly 6 waves between the dotted lines

I'm pretty sure there were 6.25

 

[Farouk123456]

I'm pretty sure there were 6.25

I counted 3 times 6 waves I am sure

 

[Ahmed Khattab]

Guys vote for your expected GT and post your physics doubts here.

 

[Ahmed Khattab]

https://www.xtremepapers.com/community/threads/physics-as-paper-21-gt-and-doubts.33804/

 

[Ahmedlool]

Guys what did you get for the Xf or whatever that waas....how did u do it?

 

[Ahmedlool]

guys btw i chose, for the water wave, that its longitudional and stationary. am i right or wrong?

 

[immie.rose]

guys btw i chose, for the water wave, that its longitudional and stationary. am i right or wrong?

Dunno about the stationary or progressive part, but the wave was transverse for sure. They gave an arrow next to the vibrator showing up and down vibrations, whereas the direction of travel for the wave was perpendicular to it.

 

[Wolfgangs]

It is a progressive wave as they have speed and they are transverse due to their motion. Plus, I saw this question somewhere in my textbook XP

 

[Ahmedlool]

would a 43 still be considered an A?

 

[Wolfgangs]

What was the displacement in the first question?

 

[Wolfgangs]

would a 43 still be considered an A?

Of course, do your best in the remaining two papers

 

[snipex]

guys the current was 6 amp power in one lamp was 27w and internal resisntace was 3

 

[saadkhan97]

What values? I got 6 with e=Ir+IR

yeah it was 6 A and power is 28W as it not same as EMF

 

[snipex]

yes

 

[Aizah K]

I did both toward rght since they are not -ve

 

[Wolfgangs]

About the moment question. Why does the weight does not affected the force Fb?

And regarding the EMF and PD difference
EMF - converts other forms of energy to electrical energy
PD - converts electrical energy to other forms of energy
Is that good enough?

 

[Yunus haji]

Did someone get 0.04m as the wavelength?
I got 6.25 waves for 25cm length drawn in the figure. :/

I got exactly 0.04

because it was 25/6 = 4.17mm
then 4.17 / 100 = 0.04

 

[saadkhan97]

About the moment question. Why does the weight does not affected the force Fb?

And regarding the EMF and PD difference
EMF - converts other forms of energy to electrical energy
PD - converts electrical energy to other forms of energy
Is that good enough?

moments about fb and fa is the contact force of clockwise moments about A