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31.03.2020 •
Physics
When resistors 1 and 2 are connected in series, the equivalent resistance is 20.4 Ω. When they are connected in parallel, the equivalent resistance is 3.86 Ω. What are (a) the smaller resistance and (b) the larger resistance of these two resistors?
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Ответ:
(A) Smaller resistance will be equal to 5.175 ohm
(b) Larger resistance will be equal to 15.225 ohm
Explanation:
Let the two resistances are and
It is given that when they are connected in series their equivalent resistance is 20.4 ohm
So ------eqn 1
When they are connected in parallel their equivalent resistance is 3.86 ohm
So
From equation 1
......eqn 2
Adding eqn 1 and eqn 2
putting this value in eqn 1
(a) Smaller resistance will be equal to 5.175 ohm
(b) Larger resistance will be equal to 15.225 ohm
Ответ: