Roll Is Conducting a Research Study

question 3

Multiple Choice

Roll is conducting a research study. She wants to measure the physical connectivity in the research participants' brains by imaging their white matter. Which of the following methods will she use?

• A) diffusion tensor imaging (DTI)
• B) MRI spectroscopy
• C) functional magnetic resonance imaging (fMRI)
• D) computed tomography (CT)

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Definitions:

Power Factor

A measure of how effectively electrical power is converted into useful work output, representing the ratio of the real power flowing to the load to the apparent power in the circuit.

RLC Parallel Circuit

An electrical circuit consisting of resistors (R), inductors (L), and capacitors (C) connected in parallel, affecting the impedance and phase of the circuit.

Inductive VARs

Volt-Amps Reactive attributed to inductance in a circuit, representing power that oscillates between the source and an inductive load but does not perform work.

Impedance

A measure of the opposition that a circuit presents to the passage of a current when a voltage is applied, incorporating both resistance and reactance.