1
TS EAMCET 2023 (Online) 14th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following statements is true about LEDs?

A

High operational voltage

B

Warm-up time is required

C

Bandwidth of light is $4000\mathop {\rm{A}}\limits^{\rm{o}}-7000 \mathop {\rm{A}}\limits^{\rm{o}}$

D

Fast on-off switching

2
TS EAMCET 2023 (Online) 14th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

An amplitude modulated wave is represented by $c_m(t)=10[1+0.6 \sin (1250 t)] \sin \left(10^8 t\right)$. Then modulation index is

A

10

B

1250

C

$10^8$

D

0.6

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