Final answer:
In a parallel circuit, the value of the power (P) can be found using the formula P = Vt^2 / R. The voltage across the resistor in this circuit is 240 V and the resistance is 400 Ω. Plugging in these values, we find that P = 144 W.
Step-by-step explanation:
In a parallel circuit, the total voltage (Vt) is equal to the voltage across each element in the circuit. So, the voltage across the resistor (VR) is also 240 V.
The power (P) in a circuit can be calculated using the formula P = Vt^2 / R. Plugging in the values, P = 240^2 / 400 = 144 W.
Therefore, the value of P in the parallel circuit is 144 W.