What is the circuit voltage of an electric heater with a resistance of 15.31 ohms and drawing 7.84 amperes of current?

To determine the circuit voltage of the electric heater, you can use Ohm's law, which states that voltage (V) equals the current (I) multiplied by the resistance (R). The formula is given by:

[ V = I \times R ]

In this case, the resistance of the electric heater is 15.31 ohms, and it draws a current of 7.84 amperes. By substituting these values into the formula, you can calculate the voltage:

[ V = 7.84 , \text{A} \times 15.31 , \Omega = 120.03 , \text{V} ]

This calculation shows that the correct circuit voltage is indeed 120.03 volts.

Other potential answers can be understood better when considering the calculation of voltage using the given resistance and current. For example, the other choices represent different combinations of resistance and current that do not align with the given values for this specific scenario. Each of the alternative voltages does not derive from multiplying the provided resistance and current, reinforcing that 120.03 volts is the coherent and accurate calculation for this particular electric heater setup.