If the LED is not glowing in the following circuit, what is the value

1.	If the LED is not glowing in the following circuit, what is the value of R?
A.	7 Ω
B.	4 Ω
C.	3 Ω
D.	5 Ω
Answer» B. 4 Ω

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If the LED is not glowing in the following circuit, what is the value of R?

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