Question:
A semiconductor X is made by doping a germanium crystal with indium \((Z = 49)\). A second semiconductor Y is made by doping germanium crystal with arsenic \((Z = 33)\). Both are joined end to end and connected to a battery as shown. Which of the following statements is correct?
A semiconductor X is made by doping a germanium crystal with indium \((Z = 49)\). A second semiconductor Y is made by doping germanium crystal with arsenic \((Z = 33)\). Both are joined end to end and connected to a battery as shown. Which of the following statements is correct?
Show Hint
Current gain is the ratio of collector to base current change, and voltage gain is beta times load over input resistance.
Updated On: Oct 1, 2026
- X is p-type, Y is n-type and the junction is forward biased.
- X is p-type, Y is n-type and the junction is reverse biased.
- X is n-type, Y is p-type and the junction is forward biased.
- X is n-type, Y is p-type and the junction is reverse biased.
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Current gain:
\(\beta = \frac{\Delta I_C}{\Delta I_B} = \frac{5\text{ mA}}{0.2\text{ mA}} = 25\).
Step 2: Voltage gain:
\[ A_v = \beta\frac{R_L}{R_i} \Rightarrow 75 = 25\times\frac{R_L}{2\text{ k}\Omega} \]
Step 3: Solve:
\[ R_L = \frac{75\times2}{25} = 6\text{ k}\Omega \]
Final Answer:
The load resistance is 6 k\(\Omega\), option (D). \[ \boxed{6\text{ k}\Omega} \]
\(\beta = \frac{\Delta I_C}{\Delta I_B} = \frac{5\text{ mA}}{0.2\text{ mA}} = 25\).
Step 2: Voltage gain:
\[ A_v = \beta\frac{R_L}{R_i} \Rightarrow 75 = 25\times\frac{R_L}{2\text{ k}\Omega} \]
Step 3: Solve:
\[ R_L = \frac{75\times2}{25} = 6\text{ k}\Omega \]
Final Answer:
The load resistance is 6 k\(\Omega\), option (D). \[ \boxed{6\text{ k}\Omega} \]
Was this answer helpful?
0
0
Top MHT CET Physics Questions
- In non uniform circular motion, the ratio of tangential to radial acceleration is (r = radius of circle, $v =$ speed of the particle, $\alpha =$ angular acceleration)
- A particle moves along a circle of radius ?$r$? with constant tangential acceleration. If the velocity of the particle is ?$?$? at the end of second revolution, after the revolution has started then the tangential acceleration is
- If $M_z$ = magnetization of a paramagnetic sample, $B$ = external magnetic field, $T$ = absolute temperature, $C$ = curie constant then according to Curie�s law in magnetism, the correct relation is
- In a fundamental mode, the time required for the sound wave to reach upto the closed end of a pipe filled with air is $'t'$ second. The frequency of vibration of air column is
- In a parallel plate capacitor, the capacity increases if
View More Questions
Top MHT CET Transistors Questions
- A change of $8.0 mA$ in the emitter current brings a change of $7.9 mA$ in the collector current. The values of $\alpha$ and $\beta$ are
- For a common emitter transistor configuration the ratio of \(\frac{I_C}{I_E} = 0.96\), then the current gain in this configuration is
- For a common emitter transistor configuration the ratio of \(\frac{I_C}{I_E} = 0.96\), then the current gain in this configuration is
- In a CE transistor, a change of $8.0 \text{ mA}$ in the emitter current produces a change of $7.8 \text{ mA}$ in the collector current. What change in the base current is necessary to produce the same change in the collector current?
- For a transistor, $\alpha_{dc}$ and $\beta_{dc}$ are the current ratios, then the value of $\frac{\beta_{dc}-\alpha_{dc}}{\alpha_{dc}\times\beta_{dc}}$ is}
View More Questions
Top MHT CET Questions
- During r- DNA technology, which one of the following enzymes is used for cleaving DNA molecule ?
- In non uniform circular motion, the ratio of tangential to radial acceleration is (r = radius of circle, $v =$ speed of the particle, $\alpha =$ angular acceleration)
- The temperature of $32^{\circ}C$ is equivalent to
- The line $5x + y - 1 = 0$ coincides with one of the lines given by $5x^2 + xy - kx - 2y + 2 = 0 $ then the value of k is
- The heat of formation of water is $ 260\, kJ $ . How much $ H_2O $ is decomposed by $ 130\, kJ $ of heat ?
View More Questions