When an a.c. power is applied to a reactive load, then the voltage is

37) The power subcircuits are made in such a manner that they do not need to carry a load of more than

38) 1 metric horsepower (1 HP) is equal to

39) Two forces 10 N and 15 N act at a point. If angle between the line of action of the forces is 60 %, then magnitude of result force is

40) A crowbar 2 m long supported on a stone is used for lifting a weight of 120 kg. If the effort applied at the other end is 40 kg, find out the distance of support from load.