Two electric bulbs marked 40 W, 220 V and 60 W, 220 V when connected in series, across same voltage supply of 220 V, the effective power is 
and when connected in parallel the effective power is 
. Then 
is
a)
0.5
b)
0.48
c)
0.24
d)
0.16
Two electric bulbs marked 40 W, 220 V and 60 W, 220 V when connected in series, across same voltage supply of 220 V, the effective power is and when connected in parallel the effective power is . Then is
a)
0.5
b)
0.48
c)
0.24
d)
0.16
Question ID - 151008 | SaraNextGen Top Answer
Two electric bulbs marked 40 W, 220 V and 60 W, 220 V when connected in series, across same voltage supply of 220 V, the effective power is and when connected in parallel the effective power is . Then is
a)
0.5
b)
0.48
c)
0.24
d)
0.16
|
Two electric bulbs marked 40 W, 220 V and 60 W, 220 V when connected in series, across same voltage supply of 220 V, the effective power is |
|||||||
|
a) |
0.5 |
b) |
0.48 |
c) |
0.24 |
d) |
0.16 |
1 Answer
127 votes
Answer Key / Explanation : (c) -
|
(c) Resistance of a bulb
When the bulbs are connected in series,
When the bulbs are connected in parallel
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127 votes
Answer Link
127