Question

A 50 ? resistor is connected in parallel with a 200 ? resistor to a 20 V power supply. What is the voltage across the 50 ? resistor?

Question 6 options:

	20 V
	4 V
	16 V
	15 V

Answer 1

remember these about Combination of Resistors

if R1 and R2 are the resistances connected in series then effective resiatcne Rnet = R1+R2

if R1 and R2 are connected in parallel, then 1/Rnet =1/R1 +1/R2 or Rnet =   R1R2/(R1+R2)

same current passes through each of the ressitor in series combination and

same votage passes through eacf of the resistor in parallel combination

apply ohms law V = iR

where V = volatge and i = current

so here Rnet in parallel = 50* 200 /250    = 40 ohms

so

as same Voltage passes in Parallel combination

here Volatage across 50 ohms resistor = VOlatge across 200 ohms = 20 V

so answer is option 1 ------<><<<<<<<<<Answer