Electrical Engineering · Question Bank

DC Generators

69 of 196 questions match · page 4 of 4. Answer in your head first, then check the solution.

📘 EE Mock Board Exam
TypeAll 196Problem solving 69Objective 127
DifficultyAll 69Easy 19Medium 41Hard 9
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#61📜 EE Pre-Board March 2017📘 PowerhouseMedium
A 6-pole lap wound dc generator has 240 armature conductors, a flux of 0.04 Wb per pole and runs at 1,500 rpm. If the armature resistance is 0.8 Ω, determine the current through each conductor.
A300 A
B100 A
C50 A
D25 A
#62📜 EE Pre-Board March 2017📘 PowerhouseMedium
In a 4-pole dynamo, the flux per pole is 15 mWb. Calculate the maximum emf induced in one of the armature conductors if armature is driven at 600 rpm.
A0.6 v
B0.3 v
C0.94 v
D0.47 v
#63📜 EE Pre-Board March 2017📘 PowerhouseEasy
The active length of each conductor placed in a DC generator armature is 0.4 m. The armature is rotated at a speed of 1,800 rpm in a magnetic field of average flux density 1.2 T. The diameter of the armature is 0.5 m. Find the emf induced in the conductor when it cuts the magnetic field at right angles.
A5.65 v
B11.31 v
C45.24 v
D22.62 v
#64📜 EE Pre-Board August 2017📘 PowerhouseEasy
In a generator, if the voltage regulation is 5.5% and the full-load voltage is 220 volts, what is the no-load voltage?
A232.1 V
B207.9 V
C225.5 V
D241.2 V
#65📜 EE Pre-Board August 2017📘 PowerhouseEasy
A 4-pole wave wound generator has 220 coils of 10 turns each. The resistance of each turn is 0.02 Ω. Find the resistance of the armature winding.
A11 Ω
B22 Ω
C44 Ω
D5.5 Ω
#66📜 EE Pre-Board March 2018📘 PowerhouseEasy
An 8-pole lap wound dc generator has 1,000 armature conductors, flux of 20 mWb per pole and emf generated is 400 v. What is the speed of the machine?
A1,000 rpm
B1,800 rpm
C1,200 rpm
D1,500 rpm
#67📜 EE Pre-Board August 2018📘 PowerhouseEasy
A 4-pole wave wound generator has 220 coils of 10 turns each. The resistance of each turn is 0.02 Ω. Find the resistance of the armature winding.
A11 Ω
B22 Ω
C0.2 Ω
D0.44 Ω
#68📜 EE Pre-Board August 2018📘 PowerhouseEasy
How many commutator bars does a 6-pole dc generator with 4 coil sides per slot and 20 slots per pole have?
A60
B120
C240
D480
#69📜 EE Pre-Board August 2018📘 PowerhouseEasy
An 8-pole triplex wave-wound armature carries a total of 660 amperes. If there are 8 brush arms, calculate the current in each armature conductor.
A110 A
B66 A
C22 A
D11 A

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