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For the following questions answer them individually
The discrete time system described by $$y(n) = x(n^2)$$ is
causal, linear and time varying
causal, nonlinear and time varying
non-causal, linear and time invariant
non-causal, non linear and time variant
What doesthe transfer function of a system describe for the system?
only zero input response
only zero state response
both zero input and zero state response
neither zero input response nor zero state response
Which of the following measures cannot be effective in reducing the noise?
reduction in signaling rate
increase in transmitted power
increase in channel bandwidth
use of redundancy
Which among the following type of transformer have smallest size with same electrical specification ?
ONAN type transformer.
Dry type transformer.
ONAF type transformer.
OFWF type transformer.
Two transformers operating in parallel will share the load depending upon their ?
Per unit impendence.
Transformer core is laminated,
because it is difficult to fabricate solid core.
because laminated core provides high flux density.
to avoid eddy current and hysteresis losses.
to increase the main flux.
The eddy current lossesin the transformer will be reduced if ?
The laminations are thick.
Number ofturns in the primary winding is reduced.
The numberof turns in the secondary winding is reduced.
The laminations are thin.
The Buchholz relay is used to protect the ?
Alternators againstall internal faults.
Oil immersed transformers against all internal faults.
Synchronous motors against all internal faults.
Transmission lines against all short circuit faults.
Why are transformer stamping annealed before being used for the building?
to reduce eddy-current loss due to burning of edges
to reduce hysteresis loss due to burning of edges
to give mechanical strength to the core
to increase core permeability
As compared to $$\triangle$$ — $$\triangle$$ bank, the capacity of the V — V bank of transformers is ---- percent.
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