A student in a town in India, where the price per unit (1 unit = 1 kW–hr) of electricity is Rs. 5.00, purchases a 1 kVA UPS (uninterrupted power supply) battery. A day before the exam, 10 friends arrive to the student's home with their laptops and all connect their laptops to the UPS. Assume that each laptop has a constant power requirement of 90W. Consider the following statements :
I : All the 10 laptops can be powered by the UPS if connected directly.
II : All the 10 laptops can be powered if connected using an extension box with a 3 A fuse.
III : If all the 10 friends use the laptop for 5 hours, then the cost of the consumed electricity is about Rs 22.50.
Select the correct option with the true statements.

Question

Examsnet · Accepted Answer

Correct Answer is :  I and III only

KVPY 2019 SA Exam Previous Papers