1
GATE EE 2016 Set 1
Numerical
+1
-0
A transistor circuit is given below. The Zener diode breakdown voltage is $$5.3$$ $$V$$ as shown. Take base to emitter voltage drop to be $$0.6$$ V. The value of the current gain $$\beta$$ is ________.
2
GATE EE 2015 Set 2
+1
-0.3
When a bipolar junction transistor is operating in the saturation mode, which one of the following statements is TRUE about the state of its collector-base (CB) and the base-emitter (BE) junctions?
A
The CB junction is forward biased and the BE junction is reverse biased.
B
The CB junction is reverse biased and the BE junction is forward biased.
C
Both the CB and BE junctions are forward biased.
D
Both the CB and BE junctions are reverse biased.
3
GATE EE 2015 Set 2
Numerical
+1
-0
In the following circuit, the transistor is in active mode and $${V_C} = 2V.$$ To get $${V_C} = 4V,$$ we replace $${R_C}$$ with $${R_C}.$$ Then the ratio $$R{'_C}/{R_C}$$ is __________.
4
GATE EE 2015 Set 1
Numerical
+1
-0
In the given circuit, the silicon transistor has $$\beta$$ $$=75$$ and a collector voltage $${V_C} = 9\,V.$$ Then the ratio of $${R_B}$$ and $${R_C}$$ is ___________.