An L-Shaped Metal Machine Part Is Made of Two Equal-Length

question 29

Multiple Choice

An L-shaped metal machine part is made of two equal-length segments that are perpendicular to each other and carry a 4.50-A current as shown in the figure. This part has a total mass of 3.80 kg and a total length of 3.00 m, and it is in an external 1.20-T magnetic field that is oriented perpendicular to the plane of the part, as shown. What is the magnitude of the NET magnetic force that the field exerts on the part?

• A) 8.10 N
• B) 11.5 N
• C) 16.2 N
• D) 22.9 N
• E) 32.4 N

---

Definitions:

Primary Reinforcer

A stimulus that satisfies basic survival needs and is naturally reinforcing, such as food, water, or sleep.

Secondary Reinforcer

A stimulus that has become rewarding through its association with a primary reinforcer, which does not inherently satisfy a biological need.

Shaping

A method of training by which successive approximations towards a desired behavior are reinforced.

Fixed Interval

In the context of operant conditioning, a schedule of reinforcement where rewards are delivered at fixed time intervals, provided the correct response is made.