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Explaining Physics by Stephen.
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Biology; Chemistry; Physics: Post your doubts here!
- Thread starter scouserlfc
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Physics a course for o level
Author : charles chew . Leong see cheng
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it is obvious there must be a constant in proportionality. haven't studied proportionality in maths!!??
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thanks... are u from bss?
No a private candidate. !!thanks... are u from bss?
The formulae is V=IR so if u need to find r put it into subject and it will be now R = V/I so when r increases current decreases and when current increases r decreases ..it is obvious there must be a constant in proportionality. haven't studied proportionality in maths!!??
And V will remain constant !!
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yep thats right...
but this works only for the ohmic resistors where temperature and other conditions remain constant!!
When current decrease, resistance decrease??? And when voltage increase current decrease? Are you sureSimple, use this formula V=IR to remember facts. When Current decreases, resistance decreases. When Current Increases, resistance Increases.
Why is current in power lines, transmitted through high voltages? Because when voltage increases, the current decreases.
That's all you should know for now.
Lol...yea okit is obvious there must be a constant in proportionality. haven't studied proportionality in maths!!??
Yeah but electricity based questions in our syllabus are all ohmc ,the temperature is always constant and this rule always applies because resistance is the property to stop flow of electron and if electrons are stopped means current decreases !!yep thats right...
but this works only for the ohmic resistors where temperature and other conditions remain constant!!
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excuse me...but it looks like you have not studied the LDR or the Thermistor..these DO NOT obey ohms law!!
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It's confusing
Current decreases when Resistance increase.
And yes, voltage increase then current decreases.
Yes i know thisexcuse me...but it looks like you have not studied the LDR or the Thermistor..these DO NOT obey ohms law!!
I was talking about a simple circuit !! With just filament lamps and other devices !!
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anybody who can make a structure of ACETELYNE and post it here not just structural formula rather whole structure means covalently bonded e.t.c
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Two carbons with triple bonds and 2hydrogen bonded on other side of carbon !
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The formula is c2h2 but ur structure formula is wrong .it should have a triple bond between carbon to complete 4bonds !
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Please check again
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I m confused in this part. I used the mole ratio solution but the answer in Marking scheme is '10800g'. I don't think that's possible becuase, that would be the mass of Octane and to calculate the mass of Carbon dioxide, shouldn't we use the mole ratio?
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got it thanks salman nad mayedah