An office has the following equipment connected to the mains (30-day month):
PHYSICS · Multi-part · CBSE · Physics · Current Electricity · Current Electricity
Problem
An office has the following equipment connected to the mains (30-day month):
(a) (i) Five desktop computers each consume 200W while in use for 8h per working day and switch to a standby mode of 65W for the remaining 16h every day.
(b) (ii) One network printer consumes 300W while printing for a total of 30min per day and remains in standby at 5W for the rest of the day.
(c) The electricity tariff is ₹7.00 per unit.
(d) (a) Calculate the total monthly electrical energy wasted in standby by (1) the computers and (2) the printer.
(e) (b) Compute the energy consumed monthly during active use by the computers and the printer separately.
(f) (c) Determine the percentage of the office’s total monthly electrical energy that is lost in standby operation.
(g) (d) Find the monthly cost attributed solely to the standby power losses.