an electric appliance takes 5A when operated on a 220V supply. Find the cost of operating the appliance for days at 2 kobo per kwh?
To find the cost of operating the electric appliance, we need to calculate the energy consumption in kilowatt-hours (kWh) and then multiply it by the cost per kWh.
First, we need to convert the current from amperes (A) to kilowatts (kW) using Ohm's Law:
Power (P) = Current (I) * Voltage (V)
P = 5A * 220V = 1100W
Now, we can calculate the energy consumption in kWh:
Energy (E) = Power (P) * Time (T) / 1000
Assuming the time is given in hours, let's consider the appliance is operated for 't' hours.
E = 1100W * t / 1000 = 1.1 * t kWh
Given the cost per kWh is 2 kobo, we can calculate the cost of operating the appliance:
Cost = Energy (E) * Cost per kWh
Cost = (1.1 * t) * 2 kobo = 2.2 * t kobo
Therefore, the cost of operating the appliance for 't' days is 2.2 * t kobo.
power used: 5A*220V = 1100W
for 2 days, that is 1100*2*24 = 52800 W-hr
Think you can finish it off now?