A potential divider is used to give outputs of 4 V and 8 V from a 12 V source. Which combination of resistances, (R1, R2, R3) gives the correct voltages ? R1:R2:R3
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a
2 : 1 : 2
b
1 : 1 : 1
c
2 : 2 : 1
d
1 : 1 : 2
answer is B.
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Detailed Solution
Resistors are connected in series. So current through each resistor will be same
A potential divider is used to give outputs of 4 V and 8 V from a 12 V source. Which combination of resistances, (R1, R2, R3) gives the correct voltages ? R1:R2:R3