Legal Metrology β’ Paper-I
Three resistance of 15 W each are connected in delta. The resistance of equivalent star will have a value of
A)
7 W
B)
5 W
C)
9 W
D)
2 W
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is '7 W' (Option A).
Legal Metrology β’ Paper-I
Ξ΄(n) is equal to
A)
u(n) + u(n-1)
B)
u(n) - u(n-1)
C)
u(n) * u(n-1)
D)
u(n) + u(n-1) + u(n-2)
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'u(n) + u(n-1)' (Option A).
Legal Metrology β’ Paper-I
A signal is an energy signal if
A)
E = 0, P = 0
B)
E = ο₯, P < ο₯
C)
E < ο₯, P = 0
D)
E < ο₯, P = ο₯
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'E < ο₯, P = ο₯' (Option D).
Legal Metrology β’ Paper-I
Transistor is in saturation when
A)
IB = beta * ICdc
B)
IB > beta * ICdc
C)
IB < beta * ICdc
D)
IB = 0
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'IB = beta * ICdc' (Option A).
Legal Metrology β’ Paper-I
The concentration of minority carriers in an extrinsic semiconductor under equilibrium is
A)
Directly proportional to the doping concentration.
B)
Inversely proportional to the doping concentration.
C)
Directly proportional to the intrinsic concentration.
D)
Inversely proportional to the intrinsic concentration.
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'Inversely proportional to the doping concentration.' (Option B).
Legal Metrology β’ Paper-I
An SCR remains turned on if the anode current is more than the
A)
Breakdown current
B)
Trigger current
C)
Holding current
D)
Threshold current
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'Holding current' (Option C).
Legal Metrology β’ Paper-I
How much is the base-to-emitter voltage of a transistor in the βonβ state?
A)
0 V
B)
0.7 V
C)
0.9 V
D)
1.0 V
Correct option: B β 0.7 V. This matches the standard definition/result for the stated question.
Legal Metrology β’ Paper-I
The signal whose ROC is entire Z plane is
A)
d(n)
B)
u(n)
C)
r(n)
D)
an
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'u(n)' (Option B).
Legal Metrology β’ Paper-I
The fundamental period of a sinusoidal signal is
A)
2Ο/Ο0
B)
2Ο
C)
2ΟΟ0
D)
0
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is '2Ο/Ο0' (Option A).
Legal Metrology β’ Paper-I
An n-type semiconductor material
A)
is intrinsic.
B)
has trivalent impurity atoms added.
C)
has pentavalent impurity atoms added.
D)
requires no doping.
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'is intrinsic.' (Option A).
Legal Metrology β’ Paper-I
FET has offset voltage of about
A)
0.2 V
B)
0.9 V
C)
0.7 V
D)
0 V
Based on established principles in the relevant subject area, the correct and most appropriate choice is '0 V' (Option D).
Legal Metrology β’ Paper-I
There is a small amount of current across the barrier of a reverse-biased diode. This current is called
A)
Forward-bias current
B)
Reverse breakdown current
C)
Conventional current
D)
Reverse leakage current
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'Reverse leakage current' (Option D).
Legal Metrology β’ Paper-I
A practical current source is represented by
A)
A resistance in series with an ideal current source
B)
A resistance in parallel with an ideal current source
C)
A resistance in parallel with an ideal voltage source
D)
A resistance in series with an ideal voltage source
Correct option: B β A resistance in parallel with an ideal current source. This matches the standard definition/result for the stated question.
Legal Metrology β’ Paper-I
Early effect is the modulation of effective base width by
A)
Emitter voltage
B)
Emitter current
C)
Collector voltage
D)
Junction temperature
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'Emitter current' (Option B).
Legal Metrology β’ Paper-I
In an intrinsic Semiconductor the free electron concentration depends on
A)
Effective mass of electrons only
B)
Effective mass of holes only
C)
Temperature of the Semiconductor
D)
Width of the forbidden energy hand of the semiconductor
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'Effective mass of electrons only' (Option A).
Legal Metrology β’ Paper-I
FET is a __________ device.
A)
Unipolar
B)
Bipolar
C)
Tripolar
D)
None of these
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'None of these' (Option D).
Legal Metrology β’ Paper-I
What is the voltage across the current source for a circuit containing a 10V source, a 5A current source, and two 5Ξ© resistors?
A)
5 V
B)
7.5 V
C)
12.5 V
D)
17.5 V
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is '17.5 V' (Option D).
Legal Metrology β’ Paper-I
How are 500W resistors connected so as to give an effective resistance of 750W?
A)
Three resistors of 500W each, in parallel
B)
Three resistors of 500W each, in series
C)
Two resistors of 500W each, in parallel
D)
Two resistors of 500W each, in parallel and the combination in series with another 500W resistor
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'Two resistors of 500W each, in parallel and the combination in series with another 500W resistor' (Option D).
Legal Metrology β’ Paper-I
The condition for the validity of Ohmβs law is that the
A)
Temperature should be remain constant
B)
Current should be proportional to the voltage
C)
Resistance must be wire wound type
D)
All of these
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'All of these' (Option D).
Legal Metrology β’ Paper-I
Which of the following transistor is affected by static electricity
A)
npn Transistor
B)
JFET
C)
UJT
D)
MOSFET
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'MOSFET' (Option D).
Legal Metrology β’ Paper-I
The type of systems which are characterized by input and the output quantized at certain levels are called as
A)
Discrete
B)
Analog
C)
Continuous
D)
Digital
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'Analog' (Option B).
Legal Metrology β’ Paper-I
Which one of the following has the ability to act as an open circuit for dc and a short circuit for ac of high frequency?
A)
An insulator
B)
A capacitor
C)
A resistor
D)
None of these
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'A capacitor' (Option B).
Legal Metrology β’ Paper-III
An inter-group reactor is used in a single-phase cycloconverter circuit to
A)
Reduced current-ripples
B)
Reduce voltage-ripples
C)
Limit circulating current
D)
Limit di/dt in the semiconductor switch
Correct option: C β Limit circulating current. This matches the standard definition/result for the stated question.
Legal Metrology β’ Paper-III
The power failure alarm must be connected to which one of the following interrupt of 8085?
A)
RST 7.5
B)
TRAP
C)
INTR
D)
HOLD
TRAP is the highest-priority 8085 interrupt.
Legal Metrology β’ Paper-III
Consider the following 8085 instruction: MVI A, A9H; MVI B, 57H; ADD B; ORA A. The flag status (S, Z, CY) after the instruction ORA A is executed, is
A)
(0, 1, 1)
B)
(0, 1, 0)
C)
(1, 0, 0)
D)
(1, 0, 1)
TRAP is the highest-priority 8085 interrupt.
