Answer: The voltage of the battery in the circuit is 90 V.
Explanation: The relationship between current, voltage, and resistance in an electric circuit can be described by Ohm's Law:
V=IR
Where V is the voltage, I is current, and R is the resistance.
We know that the resistance of the resistor is 15 Ω and the current through the resistor is 6 A. To find the voltage of the battery, we can use the formula:
V = IR
V = 15 Ω x 6 A
V = 90 V
Therefore, the voltage of the battery in the circuit is 90 V.
It means that the battery has to have a potential difference of 90V to maintain the current of 6 A flowing through the 15 Ω resistor.