An electric iron, which draws a current of 5.0 A, is connected to a 240 Vrms supply. Calculate the energy consumed if it is used for 6 minutes.
A. 432.0 kJ
B. 375.0 kJ
C. 17.3 kJ
D. 7.2 kJ?
energy=V*I*timeinSecond
D.7.2KJ
To calculate the energy consumed, we need to use the formula:
Energy (E) = Power (P) x Time (t)
First, let's find the power. Power is given by the equation:
Power (P) = Voltage (V) x Current (I)
In this case, the voltage is given as 240 Vrms, and the current is given as 5.0 A.
P = 240 V x 5.0 A = 1200 W
Now, we can calculate the energy consumed by multiplying the power (P) by the time (t).
t = 6 minutes = 6 x 60 seconds = 360 seconds.
E = P x t = 1200 W x 360 s
To convert from watts (W) to kilowatts (kW), divide by 1000:
E = (1200 W x 360 s) / 1000 = 432 kJ.
Therefore, the energy consumed if the electric iron is used for 6 minutes is 432 kJ.
The correct answer is A. 432.0 kJ.