Activity 1: EMF of DC Generator
Name: ____________________________
Solve the following problems.
1. Thirty- six dry cells are connected in four parallel groups of nine cells in
series per group. If the voltage and current rating of each cell is 1.45 volts and
4 amp respectively, (a) calculate the voltage, current, and power rating of the
entire combination. (b) Recalculate the problem for nine parallel groups of four
cell in series per group.
2. Calculate the average voltage generated in a moving conductor if it cuts
2.5x106maxwells in 1/40 sec; in 1/80 sec.
3. A six pole dc generator has an armature winding with 504 conductors
connected in six parallel path. Calculate the generated voltage in this machine
if each pole produces 1.65x106maxwells and the armature speed is 1,800
rpm.
4. The armature winding of the generator of problem no. 3 is modified so that
it has two parallel paths instead of six. At what speed should the machine be
driven if it is develop the same voltage as before the change, assuming all
other conditions to remain unchanged?
