Electronics and Communication Engineering - Analog Electronics
Exercise : Analog Electronics - Section 4
- Analog Electronics - Section 11
- Analog Electronics - Section 21
- Analog Electronics - Section 20
- Analog Electronics - Section 19
- Analog Electronics - Section 18
- Analog Electronics - Section 17
- Analog Electronics - Section 16
- Analog Electronics - Section 15
- Analog Electronics - Section 14
- Analog Electronics - Section 13
- Analog Electronics - Section 12
- Analog Electronics - Section 1
- Analog Electronics - Section 10
- Analog Electronics - Section 9
- Analog Electronics - Section 8
- Analog Electronics - Section 7
- Analog Electronics - Section 6
- Analog Electronics - Section 5
- Analog Electronics - Section 4
- Analog Electronics - Section 3
- Analog Electronics - Section 2
36.
In the op-amp circuit given in the figure, the load current iL is
Answer: Option
Explanation:
Applying KCL
[KCL at non inverting terminal]
.
37.
A CE amplifier has re = 6 Ω, β = 100 and a = 0.98. The input impedance is
Answer: Option
Explanation:
Input impedance of CE amplifier is β re = 100 X 6 = 600 Ω.
38.
A full wave diode rectifier using centre tapped transformer has diodes with forward resistance of 50 ohms each. The load resistance of 50 ohms each. The load resistance is also 50 ohms. The voltage regulation is
Answer: Option
Explanation:
No load output voltage = 
Output voltage at full load = 
39.
Leakage current approximately doubles for every 10°C increase in the temperature of a transistor has ICBO = 400 nA at 25°C, then its leakage current at 80°C
Answer: Option
Explanation:
ICBO = (400 x 10-9) 2(80-25)/10 = 18 μA.
40.
A CB amplifier has IE = 3.5 mA, a = 0.98 and RL = 600 Ω. The input impedance
0.98 Ω
0.025 Ω
600 Ω
Answer: Option
Explanation:
. Input impedance of CB amplifier equals re .
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