The question is incomplete. The complete question is as follows.
The chart shows the voltage of four electric currents. A two-column table with 2 row titled Voltage of Currents. The first column labeled Current has entries W, X, Y, Z. The second column labeled Volts (volts) has entries 9.0, 1.5, 3.0, 4.5.
Which is best supported by the data in the chart?
A. Current W flows at a higher rate than Current Z.
B. Current Y flows at a lower rate than Current X.
C. Current X has a lower potential difference than Current Y.
D. Current Z has a greater potential difference than Current W.
Answer: C. Current X has a lower potential difference than Current Y.
Explanation: The table described is show below:
Current Volts (volts)
W 9.0
X 1.5
Y 3.0
Z 4.5
Current is defined by the flow of charge that passes through a material, called conductor in an amount of time:
I =
where:
Q is charge in Coulomb
t is time in seconds
I is the current in Ampere: A = C/s
According to the question, the currents are not defined by charge or numbers, so it's difficult to determine its value. So, alternatives A and B aren't correct.
Voltage is the difference in electrical potential between two points. It is because of the voltage that the charges flow.
From the table, Current W has the biggest voltage of all the others. So, alternative D is incorrect.
Analysing the voltages of Current X and Y, we observe that they are 1.5 and 3.0, respectively. So, volts or the potential diference of current X is lower than Y, making alternative C the correct one.