A 90-W incandescent lamp is connected to a 110-V source and is left burning continously in an otherwise dark staircase. Determine the following: (a) the current through the lamp. (b) the cost (in cents) of operating the light for five hours if electricity costs 9.5 cents per KWh.
A 90-W incandescent lamp is connected to a 110-V source and is left burning continously in an otherwise dark staircase. Determine the following: (a) the current through the lamp. (b) the cost (in cents) of operating the light for five hours if electricity costs 9.5 cents per KWh.
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