Question

Easy medal ^.^ PLease help :j

Answer 1

The electricity that is delivered to our homes from regional generating stations moves over transmission lines that are _____.
A) high voltage and low current
B) high voltage and high current
C) low voltage and high current
D)low voltage and low current

Answer 2

Are you familiar with ohm's law?

Answer 3

yupsters, somewhat

Answer 4

I'm assuming you're currently taking E&M
ok, so ohm's law is \[\large V=IR\]
When electricity is delivered from a power station, it has to go over hundreds of miles to local power plants blah blah and they are reduced using transformers.

The eventual voltage that comes from a power outlet is 110V. Now think about this, the stronger the resistance, the more power is wasted in the form of heat. therefore resistance want's to be minimized.

Answer 5

Taking all of this into consideration, look at the possible answers.

Answer 6

Sooo, w/ this said the answer would be ... o.O

Answer 7

ok at a power plant, the voltage across transmission lines is several 100,000 V.
it is transmitted to power stations and reduced down to maybe 10,000V
then transformers reduce them again so that it supplies maybe a city block.
with such high voltage and low resistance this becomes a math problem
\[\large V=IR\]
if V is really big, and R is really small, what must I be?

Answer 8

"I" would be big

Answer 9

and there is your answer

Answer 10

Otay, but which answer above?

Answer 11

Do you know what the letters in ohm's law represent?

Answer 12

V=voltage
I=current
R=resistance

The voltage is obviously high at around 100,000 Volts
You just told me current is high (which is correct)
so which answer fits that?

Answer 13

B) high voltage&high current

Answer 14

correct

Answer 15

Thank yous sooo very much for explaining that down to the "t" & bearing w/ me ;D I sincerely appreciate it :j

Answer 16

no worries