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# Howas the Edexcel AS phy paper? watch

1. (Original post by Narin)
Don't listen to him, it's 10MOhms.
2 resistors of 10M ohms in series are not supposed to have unequal voltages across them. Dont u know ur physics?

it was 5M ohms using:

(R/(R+10,000,000))*9=3

This is a formula for potetial dividers.

Vr=(r/(R+r))*V
2. oh damn i misread the question... thought the resistor was 100Mohms damn oh damn oh damnnn

okay caaaalm downnn

gotta revise C3 and C4 lets pretend im happy...and awake...
2 resistors of 10M ohms in series are not supposed to have unequal voltages across them. Dont u know ur physics?

it was 5M ohms using:

(R/(R+10,000,000))*9=3

This is a formula for potetial dividers.

Vr=(r/(R+r))*V
Yeah Thats resistance of 2 parallel resistors(Resistor AND voltmeter).

They wanted resistance of resistor ONLY. Which is 10Mohms. NOT 5Mohms.
4. yeah... i also got 5 MegaOhms !!! and that's the correct answer !
5. Dont u know ur physics?
Don't YOU know your physics? You forgot to take into account the resistance of both of the voltmeters.
If R (resistance of resistor only) was equal to 5Mohms then the resistance of the resistor and voltmeter connected in parallel with it would be:

5 x 10 / 5 + 10 = 3.333333333 Mohms

Equate that into the potential divider question, with the voltage across the other voltmeter (in series with the combo):

6 / V2 = 10 / 3.333333333

V2 = 2V ... which is not correct.

yeah... i also got 5 MegaOhms !!! and that's the correct answer !

No it isn't!!!!!!

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