1
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

Find the logic gate, when both the inputs are high but the output is low and vice-versa.

A
AND
B
OR
C
NAND
D
NOR
2
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

What is the minimum band-gap of the LED diode?

A
1.5 eV
B
1.7 eV
C
1.8 eV
D
0.8 eV
3
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

The displacement of a wave is given by

$$y = 20\cos (\omega t + 4z)$$

The amplitude of the given wave is

A
$$10$$
B
$$20$$
C
$$20\sqrt2$$
D
$$10\sqrt2$$
4
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

If frequencies are $$(\nu-1)$$ and $$(\nu+2)$$, then find the value of beats.

A
2
B
1
C
3
D
4
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