A) \[\frac{\omega (M+2M)}{M}\]
B) \[{{a}_{c}}={{k}^{2}}{{r}^{2}}{{t}^{2}},\]
C) \[2mk{{r}^{2}}t\]
D) \[mk{{r}^{2}}{{t}^{2}}\]
Correct Answer: D
Solution :
The term LED is abbreviated as Light Emitting Diode. It is forward-biased p-n junction which emits spontaneous radiation. Current in the circuit = 10 mA \[=10\times {{10}^{-3}}A\] Voltage \[=6-2=4V\] From Ohms law, \[V=lR\] \[R=\frac{V}{l}=\frac{4}{10\times {{10}^{-3}}}\] \[=400\Omega \]
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