MCQOPTIONS
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MCQOPTIONS
This section includes 6 Mcqs, each offering curated multiple-choice questions to sharpen your Electronic Devices and Circuits Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A designer wishes to create a BJT amplifier with a gm of 50 mA/V and a base input resistance of 2000 O or more. What is the minimum ß he can tolerate for the transistor used? |
| A. | 100 |
| B. | 150 |
| C. | 200 |
| D. | 250 |
| Answer» B. 150 | |
| 2. |
A transistor operating with nominal gm of 60 mA/V has a ß that ranges from 50 to 200. Also, the bias circuit, being less than ideal, allows a 20% variation in Ic. What is the largest value found of the resistance looking into the base? |
| A. | 1050 ohm |
| B. | 21000 ohm |
| C. | 3150 ohm |
| D. | 4200 ohm |
| Answer» E. | |
| 3. |
A transistor operating with nominal gm of 60 mA/V has a ß that ranges from 50 to 200. Also, the bias circuit, being less than ideal, allows a 20% variation in Ic. What is the smallest value found of the resistance looking into the base? |
| A. | 347 ohm |
| B. | 694 ohm |
| C. | 1041 ohm |
| D. | 1388 ohm |
| Answer» C. 1041 ohm | |
| 4. |
A transistor with ß = 120 is biased to operate at a dc collector current of 1.2 mA. Find the value of Re. |
| A. | 2.5 ohm |
| B. | 20.6 ohm |
| C. | 25.2 ohm |
| D. | 30.4 ohm |
| Answer» C. 25.2 ohm | |
| 5. |
A transistor with ß = 120 is biased to operate at a dc collector current of 1.2 mA. Find the value of R?p. |
| A. | 625 ohm |
| B. | 1250 ohm |
| C. | 2500 ohm |
| D. | 5000 ohm |
| Answer» D. 5000 ohm | |
| 6. |
A transistor with ß = 120 is biased to operate at a dc collector current of 1.2 mA. Find the value of gm. |
| A. | 12mA/V |
| B. | 24 mA/V |
| C. | 36 mA/V |
| D. | 48 mA/V |
| Answer» E. | |