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Questions and Answers
What is the armature resistance of the generator given a line current of 38 A and an Ea value of 217.2 V?
What is the armature resistance of the generator given a line current of 38 A and an Ea value of 217.2 V?
- 0.2 Ω
- 0.6 Ω
- 0.8 Ω
- 0.4 Ω (correct)
What is the no-load speed of the generator if the no-load current is 1 A and the induced voltage is 239.6 V?
What is the no-load speed of the generator if the no-load current is 1 A and the induced voltage is 239.6 V?
- 27,800 rpm
- 25,151 rpm (correct)
- 20,000 rpm
- 23,500 rpm
In a DC generator, what represents the induced voltage in the rotor coils when the generator rotates?
In a DC generator, what represents the induced voltage in the rotor coils when the generator rotates?
- Resistor
- Voltage source (correct)
- Current source
- Capacitor
What induces the pole flux in a DC generator?
What induces the pole flux in a DC generator?
In a DC generator, what does the field circuit consist of?
In a DC generator, what does the field circuit consist of?
Which type of DC generator has the equation E_a = Vt + I_a Ra?
Which type of DC generator has the equation E_a = Vt + I_a Ra?
What is the equivalent circuit equation for a DC generator?
What is the equivalent circuit equation for a DC generator?
What type of generator has the equation vt = If Rf and Ia = Il + If?
What type of generator has the equation vt = If Rf and Ia = Il + If?
What is the value of induced voltage if the line current is 38 A and armature resistance is 0.6 Ω?
What is the value of induced voltage if the line current is 38 A and armature resistance is 0.6 Ω?
What happens to the speed of a DC generator when the field current increases significantly?
What happens to the speed of a DC generator when the field current increases significantly?
What is the armature resistance of the DC generator if the generated voltage Ea is 217.2 V and the line current is 38 A?
What is the armature resistance of the DC generator if the generated voltage Ea is 217.2 V and the line current is 38 A?
In a DC generator, what does the field voltage Vf represent?
In a DC generator, what does the field voltage Vf represent?
What is the significance of the pole flux in a DC generator?
What is the significance of the pole flux in a DC generator?
Which type of DC generator has the equation Ea = Vt + IaRa and vt = IfRf?
Which type of DC generator has the equation Ea = Vt + IaRa and vt = IfRf?
What is the role of the DC excitation/field current in a generator?
What is the role of the DC excitation/field current in a generator?
If the no-load voltage of a DC generator is 239.6 V with a no-load current of 1 A, what is the no-load speed?
If the no-load voltage of a DC generator is 239.6 V with a no-load current of 1 A, what is the no-load speed?
What could be the effect on generated voltage if there is a significant increase in armature resistance in a DC generator?
What could be the effect on generated voltage if there is a significant increase in armature resistance in a DC generator?
When operating at no load, what is typically observed about the speed of a DC generator compared to when it is loaded?
When operating at no load, what is typically observed about the speed of a DC generator compared to when it is loaded?
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