In the section of the circuit, 2 incandescent lamps with a resistance of 20 ohms and 5 ohms are connected in parallel.
| November 30, 2020 | education
In the section of the circuit, 2 incandescent lamps with a resistance of 20 ohms and 5 ohms are connected in parallel. What is the total resistance of this section of the circuit?
The total resistance when two resistors are connected in parallel is as follows:
1 / R = 1 / R1 + 1 / R2
Then, using this formula, we calculate the resistance:
1 / R = 1/20 + 1/5;
1 / R = (1 + 4) / 20;
1 / R = 1/4;
R = 4 ohms;
Answer: 4 ohms.
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