1
AP EAPCET 2025 - 22nd May Morning Shift
MCQ (Single Correct Answer)
+1
-0
A transistor has 3 impurity regions of different doping levels. In the order of increasing doping level, the regions are
A

emitter, base, collector

B

collector, base, emitter

C

base, emitter, collector

D

base, collector, emitter

2
AP EAPCET 2025 - 21st May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A transistor works as an amplifier when

A

emitter-base junction is forward biased and base-collector junction is reverse biased.

B

both emitter-base and base-collector junctions are forward biased.

C

both emitter-base and base-collector junctions are reverse biased.

D

emitter-base junction is reverse biased and base-collector junction is forward biased.

3
AP EAPCET 2025 - 21st May Evening Shift
MCQ (Single Correct Answer)
+1
-0

If five logic gates are connected as shown in the figure, then the values of $y_1, y_2$ and $y_3$, are respectively

AP EAPCET 2025 - 21st May Evening Shift Physics - Semiconductor Devices and Logic Gates Question 16 English
A

1, 1, 1

B

$0,0,1$

C

$1,1,0$

D

$1,0,1$

4
AP EAPCET 2025 - 21st May Morning Shift
MCQ (Single Correct Answer)
+1
-0

A Zener diode of breakdown voltage 20 V is connected as shown in the given circuit. The current through Zener diode is

AP EAPCET 2025 - 21st May Morning Shift Physics - Semiconductor Devices and Logic Gates Question 18 English
A

10 mA

B

4 mA

C

6 mA

D

8 mA

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