The following table gives the open-circuit voltages for different field currents of a shunt generator driven at a constant speed: Terminal voltage (V) Field current (A) 120 240 334 400 444 470 0-5 1-0 1.5 2:0 2-5 3:0 Plot a graph showing the variation of generated e.m.f. with exciting current and from this graph derive the value of the generated e.m.l. when the shunt circuit has a resistance of (a) 160 N, (b) 210 $2 and () S00 12, Also find the value of the critical resistance of the shunt circuit.

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5. The following table gives the open-circuit voltages for different field
currents of a shunt generator driven at a constant speed:
Terminal voltage (V)
Field current (A)
120 240 334 400 444 470
0-5 1-0 1-5 2:0 2:5 3-0
Plot a graph showing the variation of generated e.m.f. with exciting
current and from this graph derive the value of the generated e.m.l.
when the shunt circuit has a resistance of (a) 160 Q, (b) 210 2 and (C)
S00 2, Also find the value of the critical resistance of the shunt circuit.
Transcribed Image Text:5. The following table gives the open-circuit voltages for different field currents of a shunt generator driven at a constant speed: Terminal voltage (V) Field current (A) 120 240 334 400 444 470 0-5 1-0 1-5 2:0 2:5 3-0 Plot a graph showing the variation of generated e.m.f. with exciting current and from this graph derive the value of the generated e.m.l. when the shunt circuit has a resistance of (a) 160 Q, (b) 210 2 and (C) S00 2, Also find the value of the critical resistance of the shunt circuit.
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