Current Electricity and Electrical InstrumentHard

Question

A potential divider is used to give outputs of 2V and 3V from a 5Vsource, as shown in figure. which combination of resistances, R1, R2 and R3 gives the correct voltages?

Options

A.R1 - 1 kΩ
R2 - 1 kΩ
R3 - 2 kΩ
B.R1 - 2 kΩ
R2 - 1 kΩ
R3 - 2 kΩ
C.R1 - 3 kΩ
R2 - 2 kΩ
R3 - 2 kΩ
D.R1 - 3 kΩ
R2 - 2 kΩ
R3 - 3 kΩ

Solution

For resistors in series connection, current (I) is the same through the resistors. In other words, ratio of the voltage That is I = i.e , R1 : R2 :  R3 = 2 : 1 : 2

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