There are 17 rooms in a school, every room has two fans and 4 led bulbs. How many switches are required for the school if every fan requires a switch and one switch is required for every two bulbs?
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Answered by
15
Answer:
If too many bulbs burn out, the remaining bulbs will receive too much voltage and will burn out (and short out). That's why the plug contains fuses. Sometimes, though the bulb isn't burnt out but is loose in the socket or corroded. ... Each light has a transformer that saturates if the bulb burns out.
Answered by
42
17×4×2
=136
1 switch is equal to every two bulbs
136 ÷2
=68
therefore 68 switches will required to the school
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