An electric instrument which is connected to a 220 V line has two resistances coils A and B, each of 20 ohm resistance, which may be used separately, in series, or in parallel. What are the currents in the three cases?
Answers
Answered by
1
CASE 1: SEPARATELY
R = 20
V = 220
I = V/R = 220/20 = 11 amperes
CASE 2: SERIES
R = 20+20 = 40
V = 220
I = 220/40 = 11/2 = 6.5 amperes
CASE 3: PARALLEL
R = 20+20/20*20 = 40/400 = 1/10
V = 220
I = 220/1/10 = 220*10 = 2200 amperes
Answered by
0
Explanation:
Hope it helps to you all.
Please follow.
Attachments:
Similar questions