Question

view the electric field versus distance graph below.

a. what quantity is the independent variable?
b. what quantity is the dependent variable?
c. what is the relationship between voltage and resistance? use complete sentences to receive full credit.

Explanation:

a. The independent variable is the quantity that is manipulated or changed in an experiment. In a graph of electric - field strength versus distance, the distance is being changed to observe its effect on the electric - field strength. So, distance is the independent variable.
b. The dependent variable is the quantity that depends on the independent variable. Here, the electric - field strength depends on the distance, so electric - field strength is the dependent variable.
c. According to Ohm's law, the relationship between voltage (V), current (I), and resistance (R) is V = IR. When the current is constant, voltage is directly proportional to resistance. That is, if the resistance in a circuit increases, the voltage across that part of the circuit will increase proportionally, and vice - versa.

Answer:

a. The independent variable is distance.
b. The dependent variable is electric - field strength.
c. According to Ohm's law (V = IR), when current is constant, voltage is directly proportional to resistance.