ISRO Scientist or Engineer Electrical 2013

causal, linear and time varying

causal, nonlinear and time varying

non-causal, linear and time invariant

non-causal, non linear and time variant

only zero input response

only zero state response

both zero input and zero state response

neither zero input response nor zero state response

reduction in signaling rate

increase in transmitted power

increase in channel bandwidth

use of redundancy

ONAN type transformer.

Dry type transformer.

ONAF type transformer.

OFWF type transformer.

Ratings.

Leakage reactance.

Efficiency.

Per unit impendence.

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 laminations are thick.

Number ofturns in the primary winding is reduced.

The numberof turns in the secondary winding is reduced.

The laminations are thin.

Alternators againstall internal faults.

Oil immersed transformers against all internal faults.

Synchronous motors against all internal faults.

Transmission lines against all short circuit faults.

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

57.7

66.7

50

86.6