Question

The armature of a generator of resistance $1\Omega$ is rotated at its rated speed and produces $125V$ without load and $115V$ with full load. The current in the armature coil is

• A. $240A$
• B. $10A$
• C. $1A$
• D. $2A$

Answer 1

The correct option is B $10A$

$R=1\Omega$

$E=125V$

$e=115V$ (Back emf)

we know,

$I=\frac{V}{R}$

$I=\frac{125-115}{1}$

$I=10A$

So, the current in armature coil is 10 ampere