Question

9. A resistor R2=6.0 Q is mounted in parallel with a resistor R3=7.0 Q, and this combination is connected in series with a resistor R1=9.0 Q and a 10 Volts battery. What is the power dissipated in the R3 resistor? Watts R2 ww R3 10. Four resistors R1=9.0 Q, R2=3.0 Q,R3=11.0 2, and R4-4.0 2 are mounted as shown in the figure. The voltage of the battery is V = 18 Volts. What is the current in the R3 resistor? Amp R. wW R. R2

Answer 1

Notes Ans og The Date_L Roge, Ro = 6e & R3 = 7 0 , V = 10 vots given ckt. is as shown - here, Vi= polential difference b/wRi Vo = potential differe nieblo Rp, Ref R3 all is same . V=TOV Let the parallel equivalent of Ra and R3 ke AP = + + 2 - 1 Rp 1 R2 13 422 R3 6 70 o Re=42 R = 3.232. 13 o the equivalent au is 12 M - From ohm's haw, lov a Vg = I Rp V - 10 x 42 = 420 / 2- 159 18 159 e from ohms o haw- V+V,= v I(Rit Rp) = 10 10 Amp I = g+42 130 I = 15 Amp

Notes e Date_L Vo = 420 2140 2140 volts. 159 53 53 is The voltage across R resistor same as voltage across parallel equivalent resistor Ré. e Power dissipated in R₂ = (V₂ Power - (140) = 208140 Watts (53)² x 77 53x53 Power - 15372 x 7 Power dissipated = O. 99 67 Waltos.
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