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The ultimate aim of a filter is to achieve ripple free DC voltage. Pi filter is more efficient in removing ripples as it consists of one more capacitor at the input side.

Pi filter is considered more efficient.

Fidelity of receiver is its ability to accurately reproduce the signal which is entered as input at output. So option (a) is correct

As Electrical Energy is generated and transmitted in the form of AC current and hence power factor word is always associated with AC circuit. The low power factor is undesirable because it will lead to increase in current. So in order to maintain power factor close to unity capacitor banks are used.

Sampling theorem states that in order to accurately reconstruct a continuous-time signal from its samples, the sampling frequency must be at least twice the highest frequency component of the signal.
This theorem ensures that no information is lost during the sampling process.
Sampling theorem can be seen as a fundamental bridge between continuous time signals and discrete time signals. It finds its application in Pulse Code Modulation (PCM).
Pulse-code modulation is a method used to digitally represent sampled analog signals and coding the measured amplitude into a series of binary values, which are transmitted by modulation of a pulsed, or intermittent, carrier.
It is used in telephony and compact discs. Pulse Code Modulation is used in satellite transmission systems and space communications.

CMOS has high impedance compared to both PMOS and NMOS. It has active pull up and pull down networks. Thus static power is less. Hence consumes less power.

Signal to noise Ratio (SNR) In PWM (Pulse width modulation, SNR is moderate In PDM (Pulse position Modulation), SNR is high while in PAM (Pulse Amplitude Modulation), SNR is low. So option (b) is correct

16+16=32
Thus we have 32-input multiplexer.
If two 16-input multiplexers drive a two-input multiplexer, and all inputs are connected correctly, the output of the two-input multiplexer will be the 32nd input of the 16-input multiplexers.
The selection inputs of the two 16-input multiplexers determine which input is propagated to the output of the two-input multiplexer. By selecting the 32nd input on both 16-input multiplexers, that value will be passed through the two-input multiplexer to its output.
Therefore, if all inputs are connected properly and the selection inputs are set accordingly, the output of the two-input multiplexer will be the 32nd input.

If we combine inductor and capacitor filter ripple factor is almost independent of load filter.
The ripple factor is directly proportional to the load resistance RL in the inductor filter and inversely proportional to RL in the capacitor filter.
Therefore if these two filters are combined as LC filter or L section filter the ripple factor will be independent of RL

The heart of Microwave Oven” is magnetron. In microwave oven, magnetron uses electron electron to generate short wavelength radio waves Option (d) is correct

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