basic electronics?

Question

two electronics technicians are discussing electrical quantities. technician A says that risitance is an opposition to electrical power and voltage is electrical pressure. technician B says that current is the rate of electrical flow in a circuit and voltage is the opposition to current flow. which of the following statements is correct?

a. only technician A is correct
b. only technician B is correct
c. both technician A and technician B are correct.
d. neither of the two technicians is correct

Answer 1

c. both technician A and technician B are correct.

Reason:
................
Technician A)
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Resistance is inversely proportional to current. R = V/I where
V - voltage
I - current
R - Resistance.

Where as P = VI where
P - Power
V - Voltage
I - current

Hence Resistance is an opposition to electric power ( though indirectly). Voltage is electrical pressure because of the charge difference / potential difference it creates.

Technician B)
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Voltage is an opposition to current from the same equation R=V/I => V = R/I so voltage is inversely proportional to current.

And its a common understanding that current is the rate of electric flow in an electric circuit.

Answer 2

a.ONLY TECHNICIAN A
because technician B says dat voltage is opposing factor to flow of curent which is absolutely wrong.
voltage is the reason of flow of current.
There would have had been no current if the voltage sources are removed from a circuit.

Answer 3

Here's a common analogy

Let's say you have a bucket of water. You climb a ladder half way and drop a thin stream of water. You climb a ladder to the top and drop a thin stream of water. The height in which you climb the ladder equals your voltage.

Now, let's say you are at a place in a ladder. Height does not matter. You drop a thin stream of water. Now, you tilt your bucket more and you drop a BIG stream of water. The amount of water you in a given time will equal your current.

Let's say you are dropping a pretty good size water from your bucket. Now, you cup your hand and put it on a bucket where water is dropping. Now, it drops less water in a given time. Your hand represents resistance.

I cannot answer your question directly because the description is rather vague. It all depends on what you are reading and how the particular book chose to explain it. But, hopefully, you can use my example and arrive at your own conclusion.

Answer 4

a

Answer 5

A