A lift of mass 920 kg has a capacity of 10 persons. If average mass of person is 68 kg. Friction force between lift and lift shaft is 6000 N. The minimum power of motor required to move the lift upward with constant velocity 3 m/s is

Anonymous User Physics 24 Jan, 2020 1 Answer 215 views




A battery of unknown emf connected to a potentiometer has balancing length 560 cm. If a resistor of resistance

is connected in parallel with the cell the balancing length change by 60 cm. If the

internal resistance of the cell is 

, the value of 'n' is

Anonymous User Physics 24 Jan, 2020 1 Answer 121 views








Cascaded Carnot engine is an arrangement in which heat sink of one engine is source for other. If high temperature for one engine is T1, low temperature for other engine is T2 (Assume work done by both engine is same) Calculate lower temperature of first engine.

Anonymous User Physics 21 Jan, 2020 1 Answer 202 views