A potential divider is used to give outputs of 2 V and 3 V from a 5 V source, as shown in the figure. Which combination of resistances R 1 , R 2 , and R 3 R1, R2, and R3 give the correct voltages? 1. R 1 = 1 kΩ , R 2 = 1 kΩ , R 3 = 2 kΩ R1=1 kΩ, R2 =1 kΩ, R3 = 2 kΩ 2. R 1 = 2 kΩ , R 2 = 1 kΩ , R 3 = 2 kΩ R1=2 kΩ, R2 =1 kΩ, R3 = 2 kΩ 3. R 1 = 1 kΩ , R 2 = 2 kΩ , R 3 = 2 kΩ R1=1 kΩ, R2 =2 kΩ, R3 = 2 kΩ 4. R 1 = 3 kΩ , R 2 = 2 kΩ , R 3 = 2 kΩ R1=3 kΩ, R2 =2 kΩ, R3 = 2 kΩ

 

 

 Question:  From NCERT  | NEET   || [Difficult level:Medium] Subtopic:Resistors | || 

:A potential divider is used to give outputs of 2 V and 3 V from a 5 V source, as shown in the figure.

                                  

Which combination of resistances $R_1,R_2,\mathrm{and}{R}_3$ give the correct voltages?

1.  $R_1=1\mathrm{k\Omega },R_2=1\mathrm{k\Omega },R_3=2\mathrm{k\Omega }$

2.  $R_1=2\mathrm{k\Omega },R_2=1\mathrm{k\Omega },R_3=2\mathrm{k\Omega }$

3.  $R_1=1\mathrm{k\Omega },R_2=2\mathrm{k\Omega },R_3=2\mathrm{k\Omega }$

4.  $R_1=3\mathrm{k\Omega },R_2=2\mathrm{k\Omega },R_3=2\mathrm{k\Omega }$

Answer: 2.  

$R_1=2\mathrm{k\Omega },R_2=1\mathrm{k\Omega },R_3=2\mathrm{k\Omega }$

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