What is a resistive circuit? Write the formula for the power consumed in it.

(N/A) resistive circuit is an electrical circuit that contains only a resistor (or a combination of resistors) connected to an $AC$ source,where the current and voltage are in the same phase.
In a purely resistive circuit,the phase difference between voltage and current is $\phi = 0^\circ$.
The instantaneous power consumed in the circuit is given by $P = VI \cos \phi$.
Since $\cos 0^\circ = 1$,the average power consumed in a resistive circuit is $P_{avg} = V_{rms} I_{rms} = I_{rms}^2 R = \frac{V_{rms}^2}{R}$,where $V_{rms}$ is the root-mean-square voltage and $I_{rms}$ is the root-mean-square current.