Last Updated On [03-11-2023]
Two electric bulbs have ratings respectively of 25 W, 220 V and 100 W, 220 V. If the bulbs are connected in series with a supply of 440, which bulb will fuse?
a)
25 W bulb
b)
100 W bulb
c)
Both of these
d)
None of these
Two electric bulbs have ratings respectively of 25 W, 220 V and 100 W, 220 V. If the bulbs are connected in series with a supply of 440, which bulb will fuse?
a)
25 W bulb
b)
100 W bulb
c)
Both of these
d)
None of these
Question ID - 151243 :-
Two electric bulbs have ratings respectively of 25 W, 220 V and 100 W, 220 V. If the bulbs are connected in series with a supply of 440, which bulb will fuse?
a)
25 W bulb
b)
100 W bulb
c)
Both of these
d)
None of these
|
Two electric bulbs have ratings respectively of 25 W, 220 V and 100 W, 220 V. If the bulbs are connected in series with a supply of 440, which bulb will fuse? |
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|
a) |
25 W bulb |
b) |
100 W bulb |
c) |
Both of these |
d) |
None of these |
|
(a) Resistance of 25 W bulb It’s safe current Resistance of 100 W bulb It’s safe current when connected in series to 440 V supply, then the current
Thus, current is greater for 25 W bulb, so it will fuse. |
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A cell of internal resistance |
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b) |
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c) |
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and 
is connected to a uniform wire of length 
and resistance 
The potential gradient in the wire is
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