In a Circuit, Three Pieces of Wire Labeled A, B

question 8

Multiple Choice

In a circuit, three pieces of wire labeled A, B and C are joined at a common point D. If wire B carries 1.5 mA in a direction away from D, and wire C carries current 1.3 mA toward D, what does wire A carry?

• A) 0.2 mA toward D
• B) 0.2 mA away from D
• C) 2.8 mA toward D
• D) unable to determine
• E) 2.8 mA away from D

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Definitions:

Biceps Brachii

A muscle of the upper arm responsible for the flexion of the elbow and rotation of the forearm.

Intrinsic Hand Muscles

The muscles located within the hand that are responsible for fine motor movements and control of the fingers.

Effector Organ

An organ that responds to stimulation by a nerve impulse resulting in a specific action or secretion.

Sensory Receptor

Specialized cells or nerve endings that respond to changes in the environment by converting them into electrical impulses.