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Function: require_once
In a certain circuit containing a battery and a resistor, Ohm's law is obeyed. An instrument to measure the current in the circuit, an ammeter, is connected in between one of the terminals of the battery and one end of the resistor. The ammeter indicates that the current in the circuit is I. The battery is then removed and replaced with another battery. This time, the ammeter indicates the current is 21. Which one of the following statements concerning the resistor is true?a) When the second battery was placed in the circuit, the resistance increased to twice its initial value.b) When the second battery was placed in the circuit, the resistance decreased to one-half its initialvalue.c) When the second battery was placed in the circuit, the resistance increased to four times its initial value.d) When the second battery was placed in the circuit, the resistance decreased to one-fourth its initial value.e) When the second battery was placed in the circuit, the resistance did not change.Explain how you know that your choice above is correct.