Correct Answer: D
Explanation
Explanation
6
Correct Answered :
Wrong Answered :
A
4
B
3
C
9
D
6
6
Correct Answered :
Wrong Answered :
A
Zero
B
The current passing through it
C
twice the normal value as it depends on Hibbert`s magnetic standard
D
None of the above
Zero
Correct Answered :
Wrong Answered :
List-I (Instrument) List-II (Error)
(w) PMMC voltmeter (i) Eddy current error
(x) AC ammeter ii) Phase angle error
(y) Current transformer iii) Braking system error
(z) Enérgy męter iv) Temperature error
Choose the correct option
A
(w)- (iv), (x)-(iii), (y)-(ii), (z)-(i)
B
(W)- (iv), (x)-(i), (y)-(ii), (z)-(iii)
C
(w)-(iv), (x)-(iii), (y)-(i), (z)-(ii)
D
(w)- (ii), (x)-(iv), (y)-(i) (z)-(iii)
(w) PMMC voltmeter → sensitive to temperature variations because the copper coil resistance changes.
✅ (iv) Temperature error
(x) AC ammeter (moving iron / dynamometer type) → has errors due to inductance of the coil, which causes a phase shift between current and flux.
✅ (ii) Phase angle error
(y) Current transformer (CT) → introduces phase angle error and ratio error, but the most standard classification here is phase angle error.
✅ (ii) Phase angle error (✔️ check if duplication allowed — usually CT = phase angle error)
(z) Energy meter → uses an eddy-current-based braking system; errors arise due to this.
✅ (iii) Braking system error
Correct Answered :
Wrong Answered :
A
Copper
B
Tungsten
C
Aluminium
D
Manganin
Manganin
Correct Answered :
Wrong Answered :
A
Resistanc
B
Retentivity
C
Reluctance
D
Resilience
Reluctance
Correct Answered :
Wrong Answered :
A
Phase lead compensation.
B
Phase lag compensation
C
Gain compensation
D
Both phase lag compensation and gain compensation
Phase lead compensation
Correct Answered :
Wrong Answered :
A
gain of the system should be increased
B
gain of the system should be decreased
C
the number of zeros in the loop transfer function should be increased
D
the number of poles in the loop transfer function should be increased
gain of the system should be decreased
Correct Answered :
Wrong Answered :
A
Zero
B
Infinite
C
non-zero number
D
constant
Zero
Correct Answered :
Wrong Answered :
A
step input and type-1 G(s)
B
ramp input and type-1 G(s).
C
step input and type-0 G(s).
D
ramp input and type-0 G(s).
step input and type-1 G(s)
Correct Answered :
Wrong Answered :
I. The overall reliability of the closed-loop systems is more than that of open-loop system.
II. The transient response in the closed-loop system decays more quickly than in open loop system.
III. In an open-loop system, closing of the loop increases the overall gain of the system.
IV. In the closed-loop system, the effect of variation of component parameters on its performance is reduced.
Of these statements:
A
I and III are correct
B
I and II are correct
C
II and IV are correct
D
III and IV are correct
I. The overall reliability of the closed-loop systems is more than that of open-loop system.
❌ False → Open-loop is structurally simpler and often more reliable (fewer components). Closed-loop is more accurate but less reliable due to complexity.
II. The transient response in the closed-loop system decays more quickly than in open-loop system.
✅ True → Negative feedback improves damping, reduces overshoot, and speeds up settling.
III. In an open-loop system, closing of the loop increases the overall gain of the system.
❌ False → Negative feedback actually reduces the overall gain, but improves accuracy and stability.
IV. In the closed-loop system, the effect of variation of component parameters on its performance is reduced.
✅ True → One of the main advantages of negative feedback.
Correct Answered :
Wrong Answered :