An electric scooter uses a battery pack rated at ,
PHYSICS · Multi-part · CBSE · Physics · Current Electricity · Current Electricity
Problem
An electric scooter uses a battery pack rated at 48V, 20Ah. While cruising on level ground the motor requires 250W, but during uphill travel it needs 600W. A typical journey consists of 85 % cruising and 15 % uphill motion. The combined efficiency of the battery and motor system is 85 % (i.e.
only 85 % of the chemical energy stored is converted into useful electrical power at the motor terminals).
(i) Calculate the total energy stored in the fully charged battery pack.
(ii) Determine the effective average electrical power consumed by the motor during the journey described.
(iii) Estimate the total time for which the scooter can operate on such journeys before the battery is fully discharged.