10 lamps with a resistance of 2 Ohm connected in parallel are powered
| September 26, 2021 | education
10 lamps with a resistance of 2 Ohm connected in parallel are powered from a current source with a voltage of 220V for 2s. How much heat will it generate?
To find the heat released on the formed compound, we use the formula: Q = U ^ 2 * t / R = U ^ 2 * t * n / R1.
Values of variables: U (supply voltage connection) = 220 V; t – elapsed time (t = 2 s); n is the number of lamps (n = 10 pcs.); R1 is the resistance of each lamp (R1 = 2 ohms).
Calculation: Q = U ^ 2 * t * n / R1 = 220 ^ 2 * 2 * 10/2 = 484 * 10 ^ 3 J.
Answer: In 2 seconds, 484 kJ of body will be released on the formed compound.
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