Our assignment was to dial up the electric stimulation and measure how high the current needed to go at a given frequency in order to establish sensory threshold ( when you first begin to feel a tingle ) and motor threshold ( when muscles first begin to twitch ) . We started with 2 Hz which is two pulses per second . Then we delivered 25 Hz or 25 pulses per second . Finally , we went up to 100 Hz or 100 pulses of electrical stimulation per second .

Question: What might be a fact about what they are testing ?
Answer: They are testing out current frequencies on the human body .They are testing out how to electrocute someone .They are testing out electric currents on muscles .None of the above choices .