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Electronics and Communication Engineering - Analog Electronics

Exercise : Analog Electronics - Section 6
36.
In figure, V0 =
zero
5.7 V
6.9 V
12.6 V
Answer: Option
Explanation:

Output voltage is j 6.3 + 0.7 V.

37.
In the op-amp circuit of figure, V0 =
10 V
-10 V
5 V
-5 V
Answer: Option
Explanation:

38.
In figure the zener has a resistance of 5 ohms. As the load resistance is varied, the output voltage
will remain constant at 12 V
will vary between 12.05 and 12.65 V
will vary from 10 to 20 V
will remain constant at 12.05 V
Answer: Option
Explanation:

V0 = 12 + Iz x 5, Max Iz = 130 mA, minimum Iz = 10 mA.

39.
Percentage increase in the reverse saturation current of a diode if the temperature is increased from 25°C to 50°C
50%
500%
565.7%
575.6%
Answer: Option
Explanation:

= 2(T2 - T1)/10

= 2(50-25)/10 x 100% 565.7% .

40.
The transistor of following figure in Si diode with a base current of 40 μA and ICBO = 0, if VBB = 6V, RE = 2 kΩ and β = 90, IBQ = 20 μA then IEQ =
1800 μA
180 μA
2000 μA
3000 μA
Answer: Option
Explanation:

, ICQ = β IBQ = 90 x 20 μA = 1800 μA.

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