Thanks for the second reply!
So I know that option B is the correct answer to the question.
I have a last question: Am I correct to say that since current flows from a high potential (X) to low potential (Y), so the voltage across the power line at X is greater than the voltage across the...
Thanks for the reply!
So am i correct to say the current decreases along XY since it is going to meet some resistance. Thus, B is true. However, by Ohm's Law (V=RI), the voltage across at X should be greater than that across at Y, making C also true?
I am sorry if I misunderstood somewhere.
Homework Statement
As attached.
Homework Equations
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The Attempt at a Solution
I think P is a step-up transformer while Q is a step-down transformer. Does the current and/or voltage change during XY? I know the answer is either B or C, but I do not the explanation. Can anyone...
Homework Statement
A balloon 20 m in diameter is filled with helium at a gauge pressure of 2.0 atm. A man is standing in a basket suspended from the bottom of the balloon. A restraining cable attached to the basket keeps the balloon from rising. The balloon (not including the gas it...