Question

we have 4 resistor of 10 ohm, 20 ohm , 5 ohm, 25 ohm and a voltmeter of 12(v). find the total resistance and current

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Answer 1

Answer:

10 ohm and 20 ohm is in series

so 10 + 20 = 30 ohm

same below

5+25=30 ohm

they are in parallel

so 1/r = 1/30 + 1/30

1/r = 2/30

1/r = 1/15

r = 15 ohm

current is v=12 r=15

v=ir

12 = i × 15

i = 12/15

i = 4/5

i = 0.8A

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Answer 2

First of all which are in series Add them with each other
Like upper one 10+20=30
And Lower one is 5+25=30
30+30=60
Now put a formula
30*30/30+30 = 900/60= 15
Total resistance is 15
And total current I=V/R =12/15= 0.8