Question

what are the answers for these questions​

Answer 1

Answer:

(i) 5 ohm

(ii) Parallel combination has more advantage because in parallel combination the volatage is same and current get increases.

(iii) Current

(iv) 2.5 ohm

Explanation:

(iv) Given

R1 = 20 ohm

R2 = 10 ohm

R3 = 5 ohm

R1 , R2 & R3 are connected in parallel.

we know that

=> 1/RT(total resistance) = 1/R1 + 1/R2 +1/R3

=> 1/RT = 1/20 + 1/10 + 1/5

=> 1/RT = 1+2+4

20

=> 1/RT = 8/20

=> 1/RT = 1/2.5

=> RT( Total Resistance) = 2.5 ohm Ans.