16) What is the equivalent resistance of three resistors in series if their resi

Question

16) What is the equivalent resistance of three resistors in series if their resistances are 2 , 5 , and 13 ? 17) What is the equivalent resistance of three resistors in parallel if their resistances are 5 , 10 , and 20 ? 18) If a 15 and 25 resistor are connected in series with a 10 V power supply. what is the current through each resistor? If a 15 and 25 resistor are connected in series with a 10 V power supply, what is the potential across the 25 resistor? 19) 20) What is the current in the 5 resistor in the diagram below? 10 5

Explanation / Answer

16 . Series combination ,R = R1+R2+R3

R = 2+5+13 = 20 ohm

17. Parallel combination 1/R = 1/R1 + 1/ R2 + 1/R3

1/R = 1/2 + 1/ 5 + 1/13

R = 1.29 ohm

18 . Current = I = V /( R1+R2)

I = 10 /(40)

I = 1/4 Amp

19. Voltage across 25 ohm

V = IR

V = 25/4 = 6.25 Amp

  

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