Recent content by vadevalor

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    Potential at a point in a circuit

    Its the third paragraph from your first answer :) starting from the short line (electron flow direction)
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    Potential at a point in a circuit

    Think i got it! Yes! So its 2-1.5= 0.5v following current direction. But when do i know to use current or electron flow direction? Above for potential divider i was told to look at electron flow
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    Potential at a point in a circuit

    Should i put the 3v battery to the right or left of X and should i go from + terminal to -terminal from X to Y like current flow or electron flow? Smiles :D
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    Potential at a point in a circuit

    Thank you all for your inputs! I realized its the direction after thinking for so long. And yea it should be ohm instead of v. I have another question regarding potential could you guys help me? Answer is A but i don't understand the solution as there are 'conflicting battery direction' and i...
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    Potential at a point in a circuit

    Why is the potential at X , denoted by V, not V/8 = 4.8/(4.8+7.6) ? Why is numerator of resistance part 7.6 and not 4.8 by potential divider principle?
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    Calculating Retarding Force for a Free Falling Mass

    sounds like an oxymoron lol.
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    Distance travelled whilst decelerating

    Considering the train to be of 80 thousand kg i think that should be it. I don't know what's that principle lol, but i thought your own school tutorials and notes will suffice?
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    Distance travelled whilst decelerating

    Why wouldn't it seem right? Hmm. You have to use 19.444 m/s though. More accurate Because its negative? Your acceleration should be negative btw. Unless you put deceleration
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    Distance travelled whilst decelerating

    What's the answer? Ill try to figure tht out (lazy to do checking on calculations) Seems like you didnt use exact values for initial speed
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    Circuit Troubleshooting: Simple Setups to Ask Questions

    It has to be operating :P i think by just looking at resistance i got it - Highest power because least resistance when 2 resistors in parallel Least power when 2 resistors in series But that's assuming I and V are not outweighing Which complicates the matter more. Well furthermore V and I are...
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    Distance travelled whilst decelerating

    Did this even though its not tested and i' m rushing to study for exams but oh well :D you helped me a bit there in circuits too
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    Distance travelled whilst decelerating

    you need W= mg for weight and to calculate the frictional force. Calculate force in the direction of the retarding of the train through trigonometry then add them up to find total force slowing the train down. I thnk you can do the next part now. Formulas:W=mg F=ma...
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    Distance travelled whilst decelerating

    Using method one is faster: v2=u2+2as Kinematics equation to find s after finding acceleration thru F=ma. Tedious part is to find resultant force in the direction that retards the train first.
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    Circuit Troubleshooting: Simple Setups to Ask Questions

    "It did prove the potential at P fell since (increase in I supplied by cell due to fall in R total) is LESS than (fall in R total due to series to parallel change) which meant the v fell since IR fell, but well if no values were given how do i tell? Hmph " Aww sorry i still don't get how to...
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    Circuit Troubleshooting: Simple Setups to Ask Questions

    How do i get this? Filled in the answers for easy reference. Dont see why unless i try subbing values again. Seems like a high order application question to me. Least dissipated power: Series circuit with 2 resistors(P=V2/R V larger with 2 resistors by V=I(2R) why :( least dissipated power?)...