Advertisements
Advertisements
Question
An Electric bulb is marked 100 W, 230 V. What current does it take?
Advertisements
Solution
Current flowing in bulb = i = `"P"/"V"`
`= 100/230 = 10/23 "A" = 0.435` A
RELATED QUESTIONS
How many joules of electrical energy are transferred per second by a 6 V; 0.5 A lamp?
(a) 30 J/s
(b) 12 J/s
(c) 0.83 J/s
(d) 3 J/s
Name two gases which are filled in filament type electric light bulbs.
An electric bulb is rated at 220 V, 100 W. (a) what is its resistance? (b) what safe current can be passed through it?
Express watt hour and kilowatt hour in joule.
Point out two main disadvantages of ‘Tree System’.
What is the function of the split rings in a d.c. motor?
Three 250 W heaters are connected in parallel to a 100 V supply, Calculate total current taken from the supply.
A torch bulb is rated at 3 V and 600 mA. Calculate it’s
- power
- resistance
- energy consumed if it is used for 4 hours.
1 kWh = ______ J.
