Physics: Post your doubts here!

[usama321]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w05_qp_2.pdf
"Q7 b(ii)1", why is it 2.7 when the volt metre says zero

The voltmeter measures the potential difference between two points. the potential at both the terminals of the volt meter is 2.7. There is a difference of 0V

 

[biscuitbiscuit]

The voltmeter measures the potential difference between two points. the potential at both the terminals of the volt meter is 2.7. There is a difference of 0V

Ahhh!!!! this was so easy, thank you anyways

 

[biscuitbiscuit]

The voltmeter measures the potential difference between two points. the potential at both the terminals of the volt meter is 2.7. There is a difference of 0V

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w09_qp_21.pdf
Can you explain Q6(d), please?

 

[usama321]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w09_qp_21.pdf
Can you explain Q6(d), please?

Using the answer in b as they ask in the question, we can see that more power would be dessipated in the circuit, and less power lost in the internal resistance of the battery. Thus less energy would be lost

 

[biscuitbiscuit]

Using the answer in b as they ask in the question, we can see that more power would be dessipated in the circuit, and less power lost in the internal resistance of the battery. Thus less energy would be lost

Still didn't get it, the graph shows the power dissipation decreases! as the value of X increases

 

[usama321]

Still didn't get it, the graph shows the power dissipation decreases! as the value of X increases

It would decrease, but the overall power produced in the cell would also decrease. As a result, it would get a greater portion of the power produced in the cell.

 

[usama321]

Still didn't get it, the graph shows the power dissipation decreases! as the value of X increases

Nah, wait a second, i think i am wrong. Lemme see it again

 

[usama321]

Still didn't get it, the graph shows the power dissipation decreases! as the value of X increases

Ok. With increased resistance, less power would be produced in the cell. Now, due to less power being produced, there would be less current in the circuit. This would lead to now lesser power being dessipated in the internal resistor due to the fact that there is lesser current in the circuit, and thus less energy being wasted

 

[Suchal Riaz]

Snow Angel

 

[biscuitbiscuit]

Ok. With increased resistance, less power would be produced in the cell. Now, due to less power being produced, there would be less current in the circuit. This would lead to now lesser power being dessipated in the internal resistor due to the fact that there is lesser current in the circuit, and thus less energy being wasted

 

[Suchal Riaz]

Snow Angel

 

[Mimick]

Salam alaikum ...
I need a physics male teacher for AS level who lives in Jeddah..Only for chapter 'WAVES' and few questions in past papers...Need urgently..whoever knows pls give me his contact number...Thanks

 

[Mimick]

Salam alaikum everybody...
I need a physics male teacher for AS level who lives in Jeddah..Only for chapter 'WAVES' and few questions in past papers...Need urgently..whoever knows pls give me his contact number...Thanks

 

[Mimick]

Salam alaikum everybody...
I need a physics male teacher for AS level who lives in Jeddah..Only for chapter 'WAVES' and few questions in past papers...Need urgently..whoever knows pls give me his contact number...Thanks

 

[Suchal Riaz]

Salam alaikum everybody...
I need a physics male teacher for AS level who lives in Jeddah..Only for chapter 'WAVES' and few questions in past papers...Need urgently..whoever knows pls give me his contact number...Thanks

i can make private videos for you on waves and send it to you. you can ask me questions and doubts.

 

[Thought blocker]

i can make private videos for you on waves and send it to you. you can ask me questions and doubts.

Do same thing for me

 

[Suchal Riaz]

Do same thing for me

no. you would laugh at my accent.

 

[Thought blocker]

no. you would laugh at my accent.

Don't worry My accent is same as you, I can say it may be worst!

 

[Suchal Riaz]

Don't worry My accent is same as you, I can say it may be worst!

my accent is not like pakistani's/indians's. i took classes to learn British accent and then with time my accent changed into american due to movies and rap songs. i try to speak in a desi way to not catch attention among my friends. but when speaking english for long time i start using that accent again.

 

[Thought blocker]

my accent is not like pakistani's/indians's. i took classes to learn British accent and then with time my accent changed into american due to movies and rap songs. i try to speak in a desi way to not catch attention among my friends. but when speaking english for long time i start using that accent again.

My listening skills is awesome, I would like to hear your accent