Login

  


 

1. Which one has a higher electrical resistance: a 100 watt bulb or a 60 watt bulb?.......solve.

2. An electric bulb is rated as 10W, 220V. how many of these bulbs can be connected in parallel across the two wires of 220 V supply line if the maximum current which can be drawn is 5A?

3. Two exactly similar electric lamps are arranged (1) in parallel, & (2) in series. if the parallel and series combination of lamps are connected to 220 v supply line one by one, what will be the ratio of electric power consumed by them?

1-

we know that

https://s3mn.mnimgs.com/img/shared/discuss_editlive/3544769/2012_09_17_11_17_42/mathmlequation9081807584405310191.png

or

https://s3mn.mnimgs.com/img/shared/discuss_editlive/3544769/2012_09_17_11_17_42/mathmlequation4640758177754684456.png

thus, the bulb with a smaller power will have higher resistance and vice versa.

So, 60W bulb has a higher electrical resistance than 100W bulb.

2-

3-

For parallel combination,

  • 0
View Full Answer

1) Since power is directly proportional to resistance, the resistance of 100 w bulb is more

2) 110 bulbs

  • 0
What are you looking for?