Avery is experimenting with a simple circuit. She measures the current in the circuit three different times with a different battery each time. First, she uses a 1.5-volt battery. Next, she uses a 3-volt battery. Last, she uses a 9-volt battery. The resistance stays the same during each test.
How does the current change for each test?
a
The current decreases.
b
The current remains the same.
c
The current increases.
d
The current stops.
c. The current increases.
The current in a circuit is determined by Ohm's law, which states that the current (I) is equal to the voltage (V) divided by the resistance (R). Since the resistance stays the same during each test, the current will be directly proportional to the voltage.
a) When Avery uses a 1.5-volt battery, the current will be lower compared to when she uses a 3-volt battery or a 9-volt battery.
b) The current will be different for each test, so it does not remain the same.
c) When Avery uses a 9-volt battery, the current will be higher compared to when she uses a 1.5-volt or a 3-volt battery.
d) The current does not stop; it changes depending on the voltage applied.
Therefore, the correct answer is c) The current increases.