MCQOPTIONS
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MCQOPTIONS
This section includes 8 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. |
Given that for a transistor, hie = 1100Ω, hfe = 50, hre = 2*10-4 and hoe = 2μΩ-1. Find CB h-parameters. |
| A. | hfb = 1, hib = 22, hob = 3μΩ-1, hrb = -1.5×10-4 |
| B. | hfb = -0.98, hib = -21.56, hob = 0.03μΩ-1, hrb = 1.5×10-4 |
| C. | hfb = -0.98, hib = 21.56, hob = 0.03μΩ-1, hrb = -1.5×10-4 |
| D. | hfb = 1, hib = -21.56, hob = 0.03μΩ-1, hrb = -2×10-4 |
| Answer» D. hfb = 1, hib = -21.56, hob = 0.03μΩ-1, hrb = -2×10-4 | |
| 2. |
Consider its input resistance to be R1. Now, the bypass capacitor is attached, so that the new input resistance is R2. Given that hie = 1000Ω and hfe = 50, find R1-R2. |
| A. | 112.2Ω |
| B. | 0Ω |
| C. | 110Ω |
| D. | 200Ω |
| Answer» B. 0Ω | |
| 3. |
For the given circuit, input resistance RI = 20Ω, hfe = 50. Output resistance = ∞. Find the new values of input and output resistance, if a base resistance of 2kΩ is added to the circuit. |
| A. | RI = 20Ω, RO = ∞ |
| B. | RI = 20Ω, RO = 2kΩ |
| C. | RI = 59Ω, RO = ∞ |
| D. | RI = 59Ω, RO = 2kΩ |
| Answer» D. RI = 59Ω, RO = 2kΩ | |
| 4. |
Consider the following circuit, where source current = 10mA, hfe = 50, hie = 1100Ω, then for the transistor circuit, find output resistance RO and input resistance RI. |
| A. | RO = 0, RI = 21Ω |
| B. | RO = ∞, RI = 0Ω |
| C. | RO = ∞, RI = 21Ω |
| D. | RO = 10, RI = 21Ω |
| Answer» D. RO = 10, RI = 21Ω | |
| 5. |
Given that IB = 5mA and hfe = 55, find load current. |
| A. | 28mA |
| B. | 280mA |
| C. | 2.5A |
| D. | 2A |
| Answer» C. 2.5A | |
| 6. |
Consider the circuit. Given hfe = 50, hie = 1200Ω. Find voltage gain. |
| A. | – 278 |
| B. | -277.9 |
| C. | – 300 |
| D. | – 280 |
| Answer» B. -277.9 | |
| 7. |
Given hfe = 60, hie=1000Ω, hoe = 20μ Ω–, hre = 2 * 10-4. Find the current gain of the BJT, correct up to two decimal points. |
| A. | – 58.44 |
| B. | -59.21 |
| C. | – 60.10 |
| D. | – 60.00 |
| Answer» B. -59.21 | |
| 8. |
Consider the following circuit. __________ provides DC isolation. _____________ prevents a decrease in voltage gain. _____________ is used to control the bandwidth. |
| A. | C3, C1, C4 |
| B. | C4, C1, C2 |
| C. | C2, C3, C2 |
| D. | C4, C3, C2 |
| Answer» C. C2, C3, C2 | |