1 WH =
A). 360 joules
B). 36000 joules
C). 3600 joules
D). 36 joules
Two electric bulbs marked 25W – 220V and 100W – 220V are connected in series to a 440Vsupply. Which of the bulbs will fuse?
A). 25 W
B). Both
C). 100 W
D). Neither
Full form of CFL used in place of electric bulbs is
A). Compact fluorescent lamp
B). Constantan filament lamp
C). Closed filament lamp
D). Closed fluorescent lamp
The filament of electric bulb is made up of :
A). Copper
B). Nichrome
C). Lead
D). Tungsten
If a copper wire is increased to double its length, its resistance will become
A). Four times
B). Onefourth
C). Double
D). Half