Answer:
this is right
Step-by-step explanation:
i just took the test and it was B!
Which of the following relations is a function? {A. (1, 2), (1, 3), (2, 8), (3, 9) } B.{ (1, 2), (2, 3), (3, 4), (4, 5) } C.{ (3
lapo4ka [179]
The answer is B.<span>{ (1, 2), (2, 3), (3, 4), (4, 5) }</span>
Answer:
The new current is half the original current.
Step-by-step explanation:
Ohm's Law:
We use Ohm's law to solve this question. It states that

In which
is the voltage difference, R is the resistence, and I is the current.
A student builds a simple circuit with a single resistor with resistance R and measures an electric potential difference ΔV across the resistor.
So

![I_{1} = \frac{\Delta_V}{R}{/tex]Then, the student replaces the resistor with a new one of resistance 2R and keeps the electric potential difference the same.Now the current will be[tex]\Delta_V = 2RI_{2}](https://tex.z-dn.net/?f=I_%7B1%7D%20%3D%20%5Cfrac%7B%5CDelta_V%7D%7BR%7D%7B%2Ftex%5D%3C%2Fp%3E%3Cp%3E%3Cstrong%3EThen%2C%20the%20student%20replaces%20the%20resistor%20with%20a%20new%20one%20of%20resistance%202R%20and%20keeps%20the%20electric%20potential%20difference%20the%20same.%3C%2Fstrong%3E%3C%2Fp%3E%3Cp%3ENow%20the%20current%20will%20be%3C%2Fp%3E%3Cp%3E%5Btex%5D%5CDelta_V%20%3D%202RI_%7B2%7D)

The new current is half the original current.
Step-by-step explanation:
I believe the answer is is 14 I might be wrong
A diameter is simply twice the radius.