URGENT PHYSICS HELP PLEASE thank you
Please could I have help on question 6d ii. I understand that the current increases so using v=e-ir since everything else is constant, terminal pd would decrease. Why does the ms say the pd across internal resistance increases?
https://pmt.physicsandmathstutor.com/download/Physics/A-level/Past-Papers/CAIE/Paper-2/QP/June%202024%20(v1)%20QP.pdf
Thanks
https://pmt.physicsandmathstutor.com/download/Physics/A-level/Past-Papers/CAIE/Paper-2/QP/June%202024%20(v1)%20QP.pdf
Thanks
Reply 1
Original post
by anonymous56754Please could I have help on question 6d ii. I understand that the current increases so using v=e-ir since everything else is constant, terminal pd would decrease. Why does the ms say the pd across internal resistance increases?
https://pmt.physicsandmathstutor.com/download/Physics/A-level/Past-Papers/CAIE/Paper-2/QP/June%202024%20(v1)%20QP.pdf
Thanks
https://pmt.physicsandmathstutor.com/download/Physics/A-level/Past-Papers/CAIE/Paper-2/QP/June%202024%20(v1)%20QP.pdf
Thanks
Alright, so you see that the addition of the third resistor does make a difference! You're correct, the overall current does go up when R3 is in parallel.
Now, think about the internal resistance, r. Remember Ohm's Law? What does the current through r do to the voltage across it? If you change the current, what are you doing to the voltage drop across the internal resistance?
PS: A coherent answer according to the TSR rules.
Krgds,
Sandro
(edited 8 months ago)
Reply 2
Original post
by anonymous56754Please could I have help on question 6d ii. I understand that the current increases so using v=e-ir since everything else is constant, terminal pd would decrease. Why does the ms say the pd across internal resistance increases?
https://pmt.physicsandmathstutor.com/download/Physics/A-level/Past-Papers/CAIE/Paper-2/QP/June%202024%20(v1)%20QP.pdf
Thanks
https://pmt.physicsandmathstutor.com/download/Physics/A-level/Past-Papers/CAIE/Paper-2/QP/June%202024%20(v1)%20QP.pdf
Thanks
Hope, it is not too late.
When current increases, not everything remains the same in terminal p.d. = emf - Ir.
When current increases, the quantity Ir will increase - a larger current multiplies a constant internal resistance gives a larger p.d. across the internal resistor.
Reply 3
13
Original post
by EimmanuelHope, it is not too late.
When current increases, not everything remains the same in terminal p.d. = emf - Ir.
When current increases, the quantity Ir will increase - a larger current multiplies a constant internal resistance gives a larger p.d. across the internal resistor.
When current increases, not everything remains the same in terminal p.d. = emf - Ir.
When current increases, the quantity Ir will increase - a larger current multiplies a constant internal resistance gives a larger p.d. across the internal resistor.
Ohhh thank you so much I get it now! I have my exam later this afternoon hence the urgency😅
Reply 4
13
Original post
by NitrotolueneAlright, so you see that the addition of the third resistor does make a difference! You're correct, the overall current does go up when R3 is in parallel.
Now, think about the internal resistance, r. Remember Ohm's Law? What does the current through r do to the voltage across it? If you change the current, what are you doing to the voltage drop across the internal resistance?
PS: A coherent answer according to the TSR rules.
Krgds,
Sandro
Now, think about the internal resistance, r. Remember Ohm's Law? What does the current through r do to the voltage across it? If you change the current, what are you doing to the voltage drop across the internal resistance?
PS: A coherent answer according to the TSR rules.
Krgds,
Sandro
thank you!!
Reply 5
Original post
by anonymous56754thank you!!
Original post
by anonymous56754Ohhh thank you so much I get it now! I have my exam later this afternoon hence the urgency😅
Be at peace and use "common sense" and do the paper steadily and you will make it.
Don't need to be the first rat to complete the paper, and do what you can do first.
Reply 6
13
Original post
by EimmanuelBe at peace and use "common sense" and do the paper steadily and you will make it.
Don't need to be the first rat to complete the paper, and do what you can do first.
Don't need to be the first rat to complete the paper, and do what you can do first.
Thank you, I'll try my best ☺️
Reply 7
"Keep calm!"💯
Ciao,
Sandro
Ciao,
Sandro
Reply 8
13
Original post
by Nitrotoluene"Keep calm!"💯
Ciao,
Sandro
Ciao,
Sandro
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