WorksheetsECE19 FINALS
Total questions: 70
Worksheet time: 23mins
Name
Class
Date
1.
Which component is used to amplify signals in analog circuits?
a)
Inductor
b)
Resistor
c)
Transistor
d)
Capacitor
2.
What is the primary function of an operational amplifier (op-amp)?
a)
To convert AC to DC
b)
To store energy
c)
To filter signals
d)
To amplify voltage
3.
Which device is used to measure voltage in an analog circuit?
a)
Ammeter
b)
Voltmeter
c)
Wattmeter
d)
Ohmmeter
4.
Which component is used to store electrical energy in an analog circuit?
a)
Resistor
b)
Capacitor
c)
Inductor
d)
Diode
5.
What is the function of a diode in an analog circuit?
a)
To allow current to flow in one direction
b)
To store energy
c)
To amplify signals
d)
To filter signals
6.
Which component is used to regulate voltage in an analog circuit?
a)
Resistor
b)
Zener diode
c)
Capacitor
d)
Inductor
7.
What is the function of a potentiometer?
a)
To store energy
b)
To measure current
c)
To amplify signals
d)
To vary resistance
8.
Which component is used to convert AC to DC?
a)
Filter
b)
Transformer
c)
Oscillator
d)
Rectifier
9.
Which device is used to measure current in an analog circuit?
a)
Ammeter
b)
Voltmeter
c)
Wattmeter
d)
Ohmmeter
10.
Which component is used to protect circuits from overvoltage?
a)
Resistor
b)
Zener diode
c)
Capacitor
d)
Inductor
11.
What is the function of a transformer in an analog circuit?
a)
To store energy
b)
To amplify signals
c)
To convert voltage levels
d)
To filter signals
12.
Which component is used to smooth out voltage fluctuations in an analog circuit?
a)
Inductor
b)
Resistor
c)
Capacitor
d)
Diode
13.
Which device is used to measure resistance in an analog circuit?
a)
Voltmeter
b)
Ohmmeter
c)
Ammeter
d)
Wattmeter
14.
Which component is used to block DC while allowing AC to pass?
a)
Capacitor
b)
Inductor
c)
Diode
d)
Resistor
15.
What is the function of a voltage regulator?
a)
To maintain a constant output voltage
b)
To store energy
c)
To amplify signals
d)
To filter signals
16.
Which device is used to convert AC voltage to a different level?
a)
Filter
b)
Oscillator
c)
Rectifier
d)
Transformer
17.
Diode has polarity
a)
anode and cathode
b)
none of the above
c)
output and input
d)
on and off
18.
The number of diodes used to build a bridge rectifier
a)
1
b)
3
c)
2
d)
4
19.
Which of the following devices is used in voltage regulators ?
a)
Tunnel diode
b)
PIN diode
c)
Varactor diode
d)
Zener diode
20.
Which type of device uses continuous signals to represent information?
a)
Wireless devices
b)
Digital devices
c)
Analog devices
d)
Binary devices
21.
Which logic gate outputs true only when both inputs are true?
a)
NOT gate
b)
AND gate
c)
XOR gate
d)
OR gate
22.
Which logic gate inverts the input signal?
a)
OR gate
b)
XOR gate
c)
NOT gate
d)
AND gate
23.
Which logic gate outputs true only when the inputs are different?
a)
XOR gate
b)
OR gate
c)
AND gate
d)
NOT gate
24.
Which logic gate outputs false only when both inputs are true?
a)
NAND gate
b)
AND gate
c)
OR gate
d)
NOR gate
25.
Which logic gate outputs true only when both inputs are false?
a)
OR gate
b)
NOR gate
c)
AND gate
d)
NAND gate
26.
Which logic gate outputs true when at least one input is true?
a)
NOT gate
b)
OR gate
c)
XOR gate
d)
AND gate
27.
Which logic gate outputs false when both inputs are false?
a)
AND gate
b)
NOT gate
c)
OR gate
d)
XOR gate
28.
Which logic gate outputs true only when both inputs are true?
a)
NOT gate
b)
AND gate
c)
OR gate
d)
XOR gate
29.
Which logic gate inverts the input signal?
a)
AND gate
b)
OR gate
c)
XOR gate
d)
NOT gate
30.
What is the primary function of a shift register?
a)
To shift data bits
b)
To perform arithmetic operations
c)
To generate clock signals
d)
To store data
31.
How many bits can a 3-bit shift register store?
a)
2 bits
b)
3 bits
c)
1 bit
d)
4 bits
32.
Which type of shift register shifts data bits to the right?
a)
Left shift register
b)
Right shift register
c)
Parallel shift register
d)
Serial shift register
33.
Which type of flip-flop is commonly used in ripple counters?
a)
JK flip-flop
b)
None
c)
SR flip-flop
d)
D flip-flop
34.
What is the output of a NAND gate when both inputs are true?
a)
High impedance
b)
Undefined
c)
False
d)
True
35.
What is the output of an OR gate when both inputs are false?
a)
High impedance
b)
True
c)
False
d)
Undefined
36.
What is the output of a NAND gate when one input is true and the other is false?
a)
True
b)
False
c)
High impedance
d)
Undefined
37.
What is the output of an AND gate when one input is true and the other is false?
a)
False
b)
High impedance
c)
Undefined
d)
True
38.
What is the output of a NOR gate when both inputs are true?
a)
Undefined
b)
High impedance
c)
True
d)
False
39.
What is the output of a NAND gate when both inputs are true?
a)
False
b)
True
c)
High impedance
d)
Undefined
40.
What is the output of a NOR gate when both inputs are false?
a)
High impedance
b)
False
c)
Undefined
d)
True
41.
What is the output of an XOR gate when both inputs are true?
a)
Undefined
b)
High impedance
c)
False
d)
True
42.
What is the primary function of a shift register?
a)
To store data
b)
To generate clock signals
c)
To shift data bits
d)
To perform arithmetic operations
43.
How many bits can a 3-bit shift register store?
a)
1 bit
b)
2 bits
c)
3 bits
d)
4 bits
44.
What is the output of a 3-bit shift register after three clock pulses if the initial input is 101?
a)
101
b)
000
c)
11
d)
110
45.
Which type of shift register shifts data bits to the right?
a)
Parallel shift register
b)
Left shift register
c)
Serial shift register
d)
Right shift register
46.
What is the primary function of a ripple counter?
a)
To store data
b)
To generate clock signals
c)
To count pulses
d)
To perform arithmetic operations
47.
How many states can a 3-bit ripple counter represent?
a)
4 states
b)
8 states
c)
16 states
d)
6 states
48.
What is the maximum count value of a 3-bit ripple counter?
a)
8
b)
15
c)
7
d)
3
49.
Which type of flip-flop is commonly used in ripple counters?
a)
SR flip-flop
b)
D flip-flop
c)
Logic gates
d)
JK flip-flop
50.
A diode allows current to flow in...
a)
One direction
b)
No direction
c)
Both directions
d)
Randomly
51.
A Zener diode is used for...
a)
Current boosting
b)
Signal mixing
c)
Frequency tuning
d)
Voltage regulation
52.
Which diode emits light?
a)
Varactor
b)
Zener
c)
LED
d)
Schottky
53.
Which material is common for diodes?
a)
Gold
b)
Silicon
c)
Copper
d)
Iron
54.
Which diode is used for voltage reference?
a)
Varactor
b)
Schottky
c)
LED
d)
Zener
55.
What is the main property of a diode?
a)
One-way conduction
b)
Two-way conduction
c)
No conduction
d)
Random conduction
56.
What is the main function of a transistor?
a)
Amplify signals
b)
Generate power
c)
Display images
d)
Store data
57.
Which transistor type is commonly used in analog circuits?
a)
SCR
b)
MOSFET
c)
IGBT
d)
BJT
58.
Complete the sentence: A transistor has three terminals called...
a)
Base, collector, emitter
b)
Input, output, ground
c)
Source, drain, gate
d)
Anode, cathode, gate
59.
Which region of a transistor controls current flow?
a)
Emitter
b)
Collector
c)
Substrate
d)
Base
60.
What does a transistor amplifier do to input signals?
a)
Increases amplitude
b)
Changes frequency
c)
Decreases amplitude
d)
Blocks signals
61.
Which material is commonly used for transistor semiconductors?
a)
Aluminum
b)
Silicon
c)
Gold
d)
Copper
62.
What does 'op amp' stand for?
a)
Optional amplifier
b)
Open amplifier
c)
Output amplifier
d)
Operational amplifier
63.
Op amps are mainly used to:
a)
Store data
b)
Amplify signals
c)
Generate power
d)
Switch circuits
64.
What is the typical power supply for an op amp?
a)
5V only
b)
Battery only
c)
Dual supply
d)
No power needed
65.
Which pin is usually the inverting input?
a)
Pin 2
b)
Pin 1
c)
Pin 4
d)
Pin 3
66.
Which configuration inverts the input signal?
a)
Comparator
b)
Non-inverting
c)
Buffer
d)
Inverting
67.
Which op amp input is non-inverting?
a)
Pin 1
b)
Pin 4
c)
Pin 2
d)
Pin 3
68.
Which is a sequential circuit?
a)
Decoder
b)
Counter
c)
Multiplexer
d)
Adder
69.
What is a truth table used for?
a)
Multiply numbers
b)
Transmit signals
c)
Show logic outputs
d)
Store data
70.
Which device counts pulses?
a)
Multiplexer
b)
Counter
c)
Decoder
d)
Adder
100 %
