Voltmeter Reading (V) 9.9 9.8 9.1 8.3 6.7
Ohmmeter Reading (12) 100 50 10 5 2

A student has a nonideal 10 volt battery, some resistors, a voltmeter, and an ohmmeter and wants to determine the internal resistance of the battery and whether the resistors are ohmic. The student uses the ohmmeter to measure the resistance of each resistor. The student then connects the voltmeter across the battery terminals and one at a time connects each resistor to the battery. The table above shows the student's data. Which of the following indicates what can be concluded about the battery and resistors?
a. The internal resistance of the battery is about 1 ohm, and the resistors are ohmic
b. The internal resistance of the battery is negligible, and the resistors are nonohmic.
c. The internal resistance of the battery is about 1 ohm, and the ohmic nature of the resistors cannot be confirmed using only one potential difference measurement each
d. The internal resistance of the battery is negligible, and the ohmic nature of the resistors cannot be confirmed using only one potential difference measurement each.