# Physics questions: amplifiers

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A trivial voltage amplifier has the translate idiosyncrasy shown adown.
VOUT
VIN
1
Calculate the direct execute of the amplifier (concretion and type) and recite whether this
amplifier is inverting or non-inverting.
Formula and anticipation required.
(2
marks)
Direct Execute
Mag
Sign
Inverting / Noninverting
A 2.0Vp-p (?1.0V) AC input typeal is applied to the amplifier as shown adown.
V
Input typeal
(Volts)
5
4
3
2
1
? 1
3
6
9
t (s) time
(ms)
? 2
? 3
? 4
? 5
2
On the graph aloft induce the output AC typeal.
marks)
(2
Questions 3-7 associate to the aftercited instruction.
A voltage amplifier is used to amplifythe AC typeal input voltage from a microphone.
The amplifier idiosyncrasys are shown in the shape adown
3
Is this amplifier an inverting amplifier or a non-inverting amplifier? What is the voltage
execute of this amplifier?
(2
marks)
Inverting / Non inverting
4
Voltage Execute
What isthe collocate of input voltage so there would be no clipping?
Min:
V
Max:
(2 marks)
V
5
What is the output voltage when the input voltage is 0.03V?
(1 marks)
V
A 0.04Vp-p (?0.02V) AC input typealVINis now applied to the amplifier as shown adown.
VIN
(V)
0.02
2
4
6
8 t (ms)
-0.02
6
On the axes adown outline the AC output typeal
Output voltage graph distinctly numbered axes
marks)
(3
Vout
(V)
2
4
6
8
t (ms)
A 0.08Vp-p (?0.04V) AC input typealVINis now applied to the amplifier as shown adown.
VIN
(V)
0.04
2
6
4
8 t (ms)
-0.04
7
On the axes adown outline the AC output typeal
Complete Graph. Distinctly numbered Y-axis
(4 marks)
VOUT
(V)
2
4
6
8
t (ms)
8
9
What is attenuation?
Explanation required
(2 marks)
Describe the bark movables in copper wires and interpret why it occurs?
Explanation required
(3 marks)
10 Interpret why the trifling typeals in optical fibres are not attributable attributable attributable fictitious by the bark movables?
Explanation required
(2 marks)
11 Compare the instruction-carrying parts of copper wires and optical fibres?
Explanation required
(2 marks)

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