A Source with an Impedance of 100 $\Omega$ Is Connected to the Primary Coil of a Transformer and to the Primary

Multiple Choice

A source with an impedance of 100 $\Omega$ is connected to the primary coil of a transformer and a resistance R is connected to the secondary coil. If the transformer has 500 turns in its primary coil and 100 turns in its secondary coil the greatest power will be dissipated in the resistor if R =:

A) 0
B) 0.25 $\Omega$
C) 4.0 $\Omega$
D) 50 $\Omega$
E) 100 $\Omega$