Academiz-2nd year
Electronics Engineering Quiz
Test your knowledge with our comprehensive Electronics Engineering Quiz designed for second-year academicians. This quiz consists of a variety of questions covering key concepts in electronics, power systems, and digital logic.
Prepare for upcoming exams or simply challenge yourself with:
- Multiple choice questions
- Topics from power electronics to digital circuits
- Instant feedback on your answers
The formula for softness factor or s-factor is
T_a/t_b
T_b/t_a
Tatb
None
The switching loss per cycle in a power transistor is
Pavg x T
Pavg x 1/T
Pavg x T2
Pavg x 1/T^2
In power diode, soft recovery leads to
Smooth operation, more switching time
Smooth operation, less switching time
Smooth operation, moderate switching time
None
In how many modes can an SCR operate in?
4
3
2
5
Snubber circuit is used in which protection method
Â…†â…ˆ/â…†t protection
Â…†v/â…†t protection
Overvoltage protection
Overcurrent protection
Which element is used for ⅆⅈ/ⅆt protection?
Resistor
Inductor
Capacitor
None
The minimum firing angle is
0
2
10
20
As per IEEE standards, for an inverter to be connected to the grid, its THD should be less than
10%
5%
15%
20%
In a power diode, the maximum reverse recovery current increases greatly with
Temperature
Â…†â…ˆ/â…†t protection
Both
None
IGBT has near ideal characteristics for
High voltage, medium frequency
High voltage, high frequency
Medium voltage, medium frequency
Medium voltage, high frequency
(256.20)10 in hexadecimal system is
(95.33)16
(100.333)16
(101.222)16
(104.666)16
(256.34)10 in octal system is
(1120.150)8
(1140.160)8
(1130.170)8
(1126.150)8
If (193)x=(623)10, then the value of x is
8
10
16
18
8’s complement of (324)8 is
(455)8
(459)8
(456)8
(454)8
Which of the following is self-complementive
Decimal
Binary
Excess-3
None
Which gate is primarily used in conversion of gray code and binary?
AND
OR
XNOR
XOR
How many methods of error detection and correction codes are there?
10
15
8
12
In 1101101, using Humming code, find the error position. (assume even parity)
6th position
5th position
3rd position
None
F=m(0,1,6,7,8,9), find the function using K-maps
ABC+B' C'
A' BC+B 'C '
A B' C+B' C'
A' BC+BC
Carry function in full adder is
A(B+C)
AB+BC+CA
A' B+BC' +A' C
A' B+B' C+C' A
The formula for Cn is
0%
0
0%
0
0%
0
0%
0
F1(t)*f2(t)  F1(w)F2(w) depicts which property
Time integration
Convolution
Scaling
Symmetry
Laplace transform of a unit impulse function is
S
1/s
1
0
Laplace transform of tn is
N!/s^n
N!/s^(n+1)
N!/s^(n-1)
(n+1)!/s^n
Laplace transform of te-at is
1/(s+a)^1
1/(s+a)^2
1/(s+a)^3
None
Integration of constant signal gives
Impulse signal
Ramp signal
Unit step
Unit impulse
Differentiation of constant signal gives
Ramp function
Impulse function
Unit step function
None
What is the Laplace transform of e-at?
1/(s-a)^
1/(s+a)^
1/s
1/(s+a)^2
Laplace equivalent of inductor
Ls
L/s
Ls2
L/s2
Laplace equivalent of capacitor
Cs
1/Cs
C/s
S/C
What happens when a DC supply is applied to a transformer?
Emf is generated at secondary
No emf is generated at secondary
Transformer burns
None of the above
What is the equivalent resistance of the primary winding with respect to the secondary winding?
K2R1
R1/K2
KR1
R1/K
A 220/440V transformer has no load flux of 0.1 Wb. When a load of 5A is applied at its secondary, what is the flux?
0.7
0.5
0.1
0.3
What is the condition to be satisfied for a zero-regulation transformer?
0%
0
0%
0
0%
0
0%
0
The hysteresis and eddy current losses in a transformer depend on
Maximum flux density
Supply frequency
Both
None
In polarity test, which polarity is subjected to high voltage stress
Subtractive
Additive
Both
None
Condition for maximum efficiency
Copper loss=Iron loss/2
Copper loss=Iron loss*2
Copper loss=Iron loss
None
Which of the following conditions in necessary for connecting two transformers in parallel?
Same polarity
Same voltage rating
Same KVA rating
X/R ratio
Savings in conductor material required for winding affected by autotransformer is (letG=weight of conductor in a 2-winding transformer)
(1-k)*G
(k)*G
[k/(1-k)]*G
None
The conservator tank is usually installed on which side of the transformer?
LV
HV
LV or HV
None
In 2002, using the GIS technique, India was classified into
10 zones and 26 provinces
8 zones and 26 provinces
10 zones and 28 provinces
9 zones and 24 provinces
What is the main economy of Ladakh inheritance?
Teakwood
Plywood
Kashinore wood
None
Which region represents the world’s youngest and highest mountain chains?
Trans Himalayan region
Himalayas
Western Ghats
Gangetic plains
As per the BCD 2010, how may threat to biodiversity are present?
5
10
8
6
The term ecosystem was introduced by
Charles Darwin
A.G. Tansley
Louis Pasteur
Rachel Carson
Which of the following is not a renewable resource?
Solar
Wind
Thermal
Tidal
SO2 causes
Pulmonary diseases
Heart problems
Breathing problems
All the above
What role due to humans play in Food chains?
Producer
Consumer
Decomposer
None
Which of the following is correct?
Grass ïƒ > Lion ïƒ > Human
Cow ïƒ > Grass ïƒ > Lion
Grass ïƒ > Goat ïƒ > Humans
Leaf ïƒ > Bird ïƒ > Lizard
A food chain starts with
Producer
Consumer
Decomposer
Scavenger
What are the units of A and C in transmission line parameters?
No unit, ohm
Ohm, mho
No unit, mho
Mho, mho
Transmission line constants of a short transmission line are
0%
0
0%
0
0%
0
0%
0
The ABCD parameters of a medium transmission line using nominal-Y method are
0%
0
0%
0
0%
0
0%
0
The ABCD parameters of a medium transmission line using nominal-π method are
0%
0
0%
0
0%
0
0%
0
The formula for surge impedance (Zc) is
ˆš(L/C)
ˆšLC
ˆš(C/L)
None
The approximate value for surge impedance in overhead lines is
40Ω
400 Ω
200 Ω
20 Ω
Ferranti effect occurs when operating under
No load
Light load
Both
None
Corona is accompanied by
Bluish white glow
Hissing noise
O3 Gas formation
All of the above
Critical disruptive voltage depends on
Temperature
Pressure
Both
None
Corona loss is proportional to
F
F+25
1/f
1/(f+25)
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