The resistance 2 Ω, 4 Ω and 8 Ω are connected in parallel. Their equivalent resistance is a) 10 Ω b) 8/7 Ω c) 7.5 Ω<

Question

The resistance 2 Ω, 4 Ω and 8 Ω are connected in parallel. Their equivalent
resistance is
a) 10 Ω
b) 8/7 Ω
c) 7.5 Ω
d) 14 Ω

in progress 0
Khoii Minh 2 months 2021-07-23T17:19:17+00:00 1 Answers 1 views 0

Answers ( )

    0
    2021-07-23T17:20:41+00:00

    Answer:

    The answer to your question is the letter B. R = 8/7 Ω

    Explanation:

    Data

    R1 = 2 Ω

    R2 = 4Ω

    R3 = 8Ω

    To calculate the total resistance use the formula

             1/R = 1/R1 + 1/R2 + 1/R3

    -Substitution

             1/R = 1/2 + 1/4 + 1/8

    – Look for the Greatest common factor

                  2   4   8    2

                   1   2    4   2

                        1    2   2

                              1

    The GCF = 2 x 2 x 2 = 8

    -Sum up the fractions

                     1/2 + 1/4 + 1/8 = (4 + 2 + 1) / 8

                                            = 7/8

    -Find R

                   1/R = 7/8    then, R = 8/7 Ω

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )