If 50 *1021 Electrons Pass Through a 20- $\Omega$ Resistor in 10 Minutes, What Is the Potential Difference Across

Multiple Choice

If 5.0 *1021 electrons pass through a 20- $\Omega$ resistor in 10 minutes, what is the potential difference across the resistor?

A) 21 V
B) 32 V
C) 27 V
D) 37 V
E) 54 V