Question

(a) Define 1 kWh.
(b) A crane is lifting a body to a height h in time t. Find the relation between the power of crane
to the speed at which it is lifting the object.
TO​

Answer 1

Answer:

1kwh is the commercial unit of energy...

(b)dear pls tell after to

hope it helps dear

Answer 2

Answer:

Given: Height=h meters

time=t sec

Power= workdone/ Time

=F x S /time [∵W=Fx S]

=F x V [∵speed= Distance/time]

∴P=F X V

(a) 1 Kwh can be defined as the amount of electrical energy consumed when a 1000 watt electrical appliance is used for an hour. The unit of energy is watt. 1 Watt = 1 Joule /second. One kilowatt hour is 3.6 megajoules. It is the amount of energy converted if work is done at the rate of 1000 watts per hour