Q.Draw the block diagrams of voltage shunt and current series negative feedback.

This question asks for the two named block diagrams; the key is to show the correct input connection (shunt vs. series) and output sampling (voltage vs. current) for each. …

[!TLDR]

Voltage shunt = output voltage sampled, feedback returned in parallel (shunt) at the input; current series = output current sampled, feedback returned in series at the input.

Each negative-feedback connection is named by two choices — how the output is sampled (voltage or current) and how the feedback is mixed at the input (series or shunt).

Voltage shunt negative feedback (shunt-derived, shunt-fed):

• The output voltage $V_o$ developed across the load $R_L$ is sampled.
• The feedback network develops a feedback current $I_f$ that is mixed in parallel (shunt) with the input at node $V_i$.
• The input is best represented by a current source $I_s$; the feedback factor is $\beta = I_f/V_o$.

Current series negative feedback (series-derived, series-fed):

• The output current $I_o$ flowing through the load is sampled (the load is in series with the output).
• The feedback network returns a feedback voltage in series with the input voltage source $V_s$.
• The input is represented by a voltage source $V_s$ in the loop; the feedback factor is $\beta = I_f/I_o$. …