23.
Equivalent resistor of 2 and 3 R23 = R2R3 ÷ (R2+R3) = (50×100) ÷ (50+100) = 5000 ÷ 150 = 33.33 ohm
24. equivalent resistance of corcuit Req = R1 + R23 =
25 + 33.33 = 58.33 ohm
25. And 26. R23 and R1 connect in series so equal current flow through both , and it is equal to total current.
Ieq = Veq ÷Req 5 ÷ 58.33 = 0.0857 amp.
21 & 22 .
17 ,18 &19.
Potential across resistorR1
V1= Ieq R1 = 0.0857×25 = 2.1425Volt
Potential across resistor R2
V2= I2R2 = 0.0286× 50 = 1.43 volt
Potential across resistor R3
V3 = I3R3 = 0.0571× 100 = 5.71 volt
Question 20.
Current through R1 is equal to equivalent current
0.0857 amp
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