The Christmas tree garland consists of 20 15 Ohm lamps. What is the electrical resistance of the garland?
| June 12, 2021 | education
Initial data: n (number of lamps in a Christmas tree garland) = 20 lamps; R1 = R2 + … + R30 (resistance of one lamp) = 15 ohms.
Since the paws in the Christmas tree garlands are connected in parallel and the resistance of all lamps is the same, the electrical resistance of the entire garland is determined by the formula: R = R1 * n.
Calculation: R = 15 * 20 = 300 Ohms.
Answer: The electrical resistance of the garland is 300 ohms.
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