1
GATE ECE 2006
MCQ (Single Correct Answer)
+2
-0.6
A regulated power supply, shown in figure below, has an unregulated input (UR) of 15 volts and generates a regulated output V $$_{out.}$$ .Use the component values shown in the figure. GATE ECE 2006 Analog Circuits - Power Amplifier Question 2 English The power dissipation across the transistor Q1 shown in the figure is
A
4.8 Watts
B
5.0 Watts
C
5.4 Watts
D
6.0 Watts
2
GATE ECE 2006
MCQ (Single Correct Answer)
+2
-0.6
A regulated power supply, shown in figure below, has an unregulated input (UR) of 15 volts and generates a regulated output V o u t . out. .Use the component values shown in the figure. GATE ECE 2006 Analog Circuits - Power Amplifier Question 1 English If the unregulated voltage increases by 20% the power dissipation across the transistor Q$$_1$$
A
increases by 20%
B
increases by 50%
C
remains unchanged
D
decreases by 20%
3
GATE ECE 1987
MCQ (Single Correct Answer)
+2
-0.6
In case of class A amplifiers, the ratio (efficiency of transformer coupled amplifier)/(efficiency of a transformer less amplifier ) is
A
2.9
B
2
C
1.0
D
0.5
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