(Solved): A DC shunt geberator is connected as shown in Figure \( 4.1 \) and has a shin ...

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A DC shunt geberator is connected as shown in Figure \( 4.1 \) and has a shint field resistance of \( R_{r}=20 \Omega \) and annature renitance of \( \lambda_{4}=0.2 \Omega \). The magnetization curve of this machine is given in Figare \( 4.2 \) for the apeed of 1800 rpm. Ignore anmature reaction. Figure 4.1 Shunt connected generator a) For the speed of 1800 rpan, deteranine the talue of theortat \( R_{\text {et }} \) that gives a no-load terminal voltage of \( 300 \mathrm{~V} \). (5 marks) For the \( R_{e} \) obtained in part (a) and maintaining the shaft apeed, a resistive load \( R_{2} \) is now coasected across the terminal \( V_{R} \). Consecting this load renults in the armature current of 100 A. With this condrion: b) Determine the terminal veltage (2 marks) c) Determine the load current and load resiatance. (2 marks) d) Ignoring rotational louses and core losset, determine the terque applied to the generator input thaft. (1 mark) Interal gerented willage \( H_{4}, \mathrm{~V} \)