Answer:-
a) 23.75 Ω
b) 0.505 Ampere
c) 5.05 volts
d) 1.90 volts
Solution:-
as resistances R2 and R3 are in parallel so Thier equivalent resistance will be,
1/R23 = 1/R2 + 1/R3
1/R23 = 1/15 + 1/5
R23 = 15/4 = 3.75 Ω
Now R1, R23 and R4 are in series connection,so their equivalents resistance is,
R = R1 + R23 + R4
R = 10 + 3.75 + 10
R = 23.75 Ω
The total resistance of the circuit is 23.75 Ω.
Using ohm's law,
V = I * R
putting the known values,
I = 12/23.75
I = 0.505 Ampere
Voltage across R1 resistance is given by,
V1 = I * R1
V1 = 0.505 * 10 = 5.05 volts
Similarly for R4 resistance,
V4 = 5.05 volts
the remaining voltage will drop across the parallel combination of R2 and R3 resistances. which is,
V2 = V3 = V - V1 - V4
V2 = 12 - 5.05 - 5.05
V2 = 1.90 volts
The voltage across resistance R2 is 1.90 volts.
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