Electrical equipment in an office takes a current of 13 A from a 240 V supply. Estimate the cost per week of electricity if the equipment is used for 30 hours each week and 1 kWh of energy costs 7pQ.17. An el
Question
Electrical equipment in an office takes a current of 13 A from a 240 V supply. Estimate the cost per week of electricity if the equipment is used for 30 hours each week and 1 kWh of energy costs 7pQ.17. An el
Solution
First, we need to calculate the power of the electrical equipment. Power (P) can be calculated using the formula P = IV, where I is the current and V is the voltage.
So, P = 13 A * 240 V = 3120 W = 3.12 kW
Next, we need to calculate the total energy consumed by the equipment in a week. Energy (E) can be calculated using the formula E = Pt, where P is the power and t is the time.
So, E = 3.12 kW * 30 hours = 93.6 kWh
Finally, we can calculate the cost of the electricity. Cost can be calculated using the formula Cost = E * c, where E is the energy and c is the cost per unit of energy.
So, Cost = 93.6 kWh * 7p = 655.2p
Therefore, the cost per week of electricity for the equipment is approximately £6.55.
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