ISRO 2023 Quiz 28 Revision

The reverse saturation current of an NPN transistor in common-base circuit is 12.5 μA. For an emitter current of 2mA, collector current of 1.97 mA, then current gain and base current respectively are.

The Laplace transform of a continuous time signal x(t) is . IF the Fourier transform of the signal exists, then x(t) is

Consider the following statements regarding lag-compensator

1). Lag compensators are essentially low pass filter.

2). Lag compensator acts approximately as a proportional plus integral controller.

3). The lag compensator will not reduce the bandwidth of the system and will result in slower transient response.

Which of the above statements is/are correct?

What will be the total modulation index if a wave is amplitude modulated by three sine waves with modulation indices of 25%, 50% and 75%?