MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Analog Circuits knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Widlar current source was introduced to obtain a smaller output current. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
Consider the following circuit, where the transistors are similar Si transistors. Given I1 = 2mA, I2 = 1μA, Vcc = 12 V, find R1 and R2. |
| A. | R1 = 10kΩ, R2 = 6kΩ |
| B. | R1 = 5.6kΩ, R2 = 20kΩ |
| C. | R1 =18kΩ, R2 = any value |
| D. | R1 = 18kΩ, R2 = 5.6kΩ |
| Answer» E. | |
| 3. |
Considering all transistors to be similar and β is very large, when I1 = 10 mA, find current I2. |
| A. | 10 mA |
| B. | 50 mA |
| C. | 25 mA |
| D. | 20 mA |
| Answer» D. 20 mA | |
| 4. |
Why is self bias circuit not used in IC amplifier? |
| A. | To reduce power losses |
| B. | To reduce area used on the chip |
| C. | Stability factor reduces in the IC |
| D. | Voltage gain is reduced |
| Answer» C. Stability factor reduces in the IC | |
| 5. |
Given Vout = 5V, β=100, I1=10mA, R1=100KΩ. Find the output resistance. |
| A. | 8 kΩ |
| B. | 8.163 kΩ |
| C. | 7.582 kΩ |
| D. | 8.4 kΩ |
| Answer» C. 7.582 kΩ | |
| 6. |
In the circuit given, the two Si transistors are similar. Given β=50, Vcc=12V, I1=5mA. Find I? |
| A. | 5 mA |
| B. | 4.807 mA |
| C. | 4.5 mA |
| D. | 5.2 mA |
| Answer» C. 4.5 mA | |
| 7. |
Choose the incorrect option according to self bias circuit? |
| A. | Voltage gain increases |
| B. | Stability factor is independent of collector resistance |
| C. | BJT can be used in either of the three configurations |
| D. | Excellent stability in collector current is achieved |
| Answer» E. | |
| 8. |
Consider the biasing circuit shown. The β for the circuit is large. R3 = 1kΩ, R4 = 2kΩ. The stability factor varies between 10 and 11. Find the maximum and minimum values of R2. |
| A. | Minimum = 16.36kΩ, Maximum = 20kΩ |
| B. | Minimum = 16.36kΩ, Maximum = 18kΩ |
| C. | Minimum = 10 kΩ, Maximum = 20kΩ |
| D. | Minimum = 6 kΩ, Maximum = 10kΩ |
| Answer» B. Minimum = 16.36kΩ, Maximum = 18kΩ | |
| 9. |
For the given circuit, β = 150. Fig. 1 has stability factor S1If the above circuit is changed to below circuit Fig. 2 having stability factor S2Choose the correct option which is having better stability with S1 and S2 Values. |
| A. | S2 = 151, S1 = 150. Circuit 1 has better stability |
| B. | S2 = 100, S1 = 10 Circuit 2 has better stability |
| C. | S2 = 151, S1 = 10.3 Circuit 1 has better stability |
| D. | S2 = 151, S1 = 10.3 Circuit 2 has better stability |
| Answer» D. S2 = 151, S1 = 10.3 Circuit 2 has better stability | |
| 10. |
BJT is biased to _________ |
| A. | Work as a switch |
| B. | Prevent thermal runaway |
| C. | Increase DC collector current |
| D. | Operate it in the saturation region |
| Answer» C. Increase DC collector current | |