The expected answers were:
(a) (i) Infinite loop-gain
(ii)High input impedance
(iii) infinite bandwidth
(iv)low output impedance
A pure' recall-type' question on operational amplifiers. For the ideal device,
the characteristics include infinite input impedance, gain, and bandwidth and
zero output impedance. When connected in the 'non-inverting mode', the op-
AMP'S positive and negative terminals are connected respectively to input and
earth; or vice versa for the 'inverting mode' connection.
The question was on Amplifiers. The question was unpopular. The candidates
did poorly in it.