A. The current through a lamp connected across 154 V is 1.25 A when the lamp is on. What is the lamp’s resistance when it is on (and hot)?
b. When the lamp is COLD, its resistance is one forth as large as it is when the lamp is hot. What is its COLD resistance?
c. Then what would the current through the lamp be just after it is turned on, when it is still cold? (Still connected to a potential difference of 154 V.)
Answers: 3
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A. The current through a lamp connected across 154 V is 1.25 A when the lamp is on. What is the lamp...
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