Semiconductor Devices PYQs Set 11 (PDF)

Set 11 of 17 · Questions 301-330 of 501

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Mere Teacher · Previous Year Questions JEE Main Physics · Semiconductor Devices · Set 11 (Q301-330)
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301. $Consider the junction diode as ideal. The value of current flowing through AB is [NEET 2016]$ (1) $10^{- 2} A$ (2) $10^{- 1} A$ (3) $10^{- 3} A$ (4) $0$ 302. $Two ideal diodes are connected to a battery as shown in the circuit. The current supplied by the battery is [2012]$ (1) $0.5 A$ (2) $0.75 A$ (3) $zero$ (4) $0.25 A$ 303. $In the figure, given that V_{BB} supply can vary from 0 to 5.0 V , V_{CC} = 5 V, β_{dc} = 200, R_{B} = 100 kΩ, R_{C} = 1 KΩ and V_{BE} = 1.0 V . The minimum base current and the input voltage at which the transistor will go to saturation, will go to saturation, will be, respectively:$ (1) $25 μA and 3.5 V$ (2) $20 μA and 3.5 V$ (3) $25 μA and 2.8 V$ (4) $20 μA and 2.8 V$ 304. $The circuit given represents which of the logic operations?$ (1) $OR$ (2) $AND$ (3) $NOT$ (4) $NOR$ 305. $There is a electric circuit as shown in the figure. Find potential difference between points a and b .$ (1) $0 V$ (2) $15 V$ (3) $10 V$ (4) $5 V$ 306. $Transfer characteristics [output voltage (V_{0}) vs . Input voltage (V_{i})] for a base biased transistor in CE configuration is as shown m the figure. For using transistor as a switch, it is used [2012]$ (1) $m region (I)$ (2) $in region (III)$ (3) $both in regions (I) and in (III)$ (4) $in region (II)$ 307. $In the following logic circuit the sequence of the inputs A, B are (0,0), (0,1), (1,0) and (1,1). The output Y for this sequence will be:$ (1) $1,0,1,0$ (2) $0,1,0,1$ (3) $1,1,1,0$ (4) $0,0,1,1$ 308. $In the following circuit, the output Y becomes zero for the input combinations.$ (1) $A = 1, B = 0, C = 0$ (2) $A = 0, B = 1, C = 1$ (3) $A = 0, B = 0, C = 0$ (4) $A = 1, B = 1, C = 0$ 309. $A Zener diode of breakdown voltage 10 V is used as a voltage regulator as shown in the figure. The current through the Zener diode is$ (1) $50 mA$ (2) $0$ (3) $30 mA$ (4) $20 mA$ 310. $Two ammeters A_{1} and A_{2} are connected as shown in the given figure. By neglecting the internal resistance of the ammeters, the reading in the ammeter A_{1} is$ (1) $2 A$ (2) $0$ (3) $1 A$ (4) $4 A$ 311. $The resistivity (p) of semiconductor varies with temperature. Which of the following curve represents the correct behaviour?$ (1) (2) (3) (4) 312. $In the given circuit, the voltage across load resistance (R_{L}) is:$ (1) $8.75 V$ (2) $9.00 V$ (3) $8.50 V$ (4) $14.00 V$ 313. $In the circuit shown in the figure, the input voltage V_{i} is 20 V, V_{BE} = 0 and V_{CE} = 0 . The values of I_{B}, I_{C} and β are given by: [2018]$ (1) $l_{B} = 40 μA, I_{c} = 10 mA, β = 250$ (2) $I_{B} = 25 μA, I_{c} = 5 mA, β = 200$ (3) $I_{B} = 20 μA, I_{c} = 5 mA, β = 250$ (4) $l_{B} = 40 μA, I_{c} = 5 mA, β = 125$ 314. $The output from a NAND gate having inputs A and B given below will be,$ (1) (2) (3) (4) 315. $Which of the following logic gates is an universal gate? [2005]$ (1) $OR$ (2) $NAND$ (3) $AND$ (4) $NOT$ 316. $\|Truth table for system of four NAND gates as shown in figure is :$ (1) $A B Y 000011101110$ (2) $A B Y 000010101111$ (3) $A B Y 001011100110$ (4) $A B Y 001010100111$ 317. $The output Y of the given logic gate is similar to the output of an/a [NEET 2024]$ (1) $NAND gate$ (2) $NOR gate$ (3) $OR gate$ (4) $AND gate$ 318. $Following gates section is connected in a complete suitable circuit. For which of the following combination, bulb will glow (ON) :$ (1) $A = 0, B = 0, C = 0, D = 1$ (2) $A = 0, B = 1, C = 1, D = 1$ (3) $A = 1, B = 0, C = 0, D = 0$ (4) $A = 1, B = 1, C = 1, D = 0$ 319. $To get an output y = 1 from the circuit shown, the inputs A, B and C must be respectively$ (1) $1, 0, 1$ (2) $1, 1, 0$ (3) $0, 1, 0$ (4) $1, 0, 0$ 320. $A zener diode of power rating 1.6 W is to be used as voltage regulator. If the zener diode has a breakdown of 8 V and it has to regulate voltage fluctuating between 3 V and 10 V The value of resistance R_{s} for safe operation of diode will be$ (1) $10 Ω$ (2) $12 Ω$ (3) $13.3 Ω$ (4) $13 Ω$ 321. $Semiconductor X is made by doping a germanium crystal with arsenic (Z = 33) . A second semiconductor Y is made by doping germanium with indium (Z = 49) . The two are joined end to end and connected to a battery as shown. Which of the following statements is correct? [2012]$ (1) $X is P ‐type, Y is N ‐type and the junction is forward biased$ (2) $X is N ‐type, Y is P ‐type and the junction is forward biased$ (3) $X is P ‐type, Y is N ‐type and the junction is reverse biased$ (4) $X is N ‐type, Y is P ‐type and the junction is reverse biased$ 322. $The circuit shown below contains two ideal diodes, each with a forward resistance of 50Ω. If battery voltage is 6 V, the current through the 100Ω resistance (in Amperes) is:$ (1) $0.020$ (2) $0.030$ (3) $0.027$ (4) $0.036$ 323. $For the circuit shown below, the current through the Zener diode is :$ (1) $9 mA$ (2) $5 mA$ (3) $Zero$ (4) $14 mA$ 324. $The truth table for the given circuit is$ (1) $A B Y 111101010001$ (2) $A B Y 111101011001$ (3) $A B Y 111100011001$ (4) $A B Y 111101011000$ 325. $The truth table for the given logic circuit is [NEET 2022]$ (1) $A B C 001010100111$ (2) $A B B 001010101110$ (3) $A B C 000011100111$ (4) $A B C 001011101110$ 326. $For the given circuit, comment on the type of transformer used :$ (1) $Auxiliary transformer$ (2) $Auto transformer$ (3) $Step-up transformer$ (4) $Step down transformer$ 327. $A zener diode with 5 V zener voltage is used to regulate an unregulated dc voltage input of 25 V. For a 400Ω resistor connected in series, the zener current is found to be 4 times load current. The load current (I_{L}) and load resistance (R_{L}) are:$ (1) $I_{L} = 0.02 mA; R_{L} = 250Ω$ (2) $I_{L} = 10 A; R_{L} = 0.5Ω$ (3) $I_{L} = 10 mA; R_{L} = 500Ω$ (4) $I_{L} = 20 mA; R_{L} = 250Ω$ 328. $From the given transfer characteristic of a transistor in CE configuration, the value of power gain of this configuration is 1 0^{s}, for R_{B} = 10 kΩ, and R_{C} = 1 kΩ . The value of x is_____.$ 329. $The typical output characteristics curve for a transistor working in the common-emitter configuration is shown in the figure. The estimated current gain from the figure is$ 330. $The zener diode has a V_{z} = 30 V . The current passing through the diode for the following ciruit is mA$