A Bar (L = 80 Cm) Moves on Two Frictionless

question 34

Multiple Choice

A bar (L = 80 cm) moves on two frictionless rails, as shown, in a region where the magnetic field is uniform (B = 0.30 T) and into the paper. If v = 50 cm/s and R = 60 mΩ, what is the magnetic force on the moving bar?

• A) 0.48 N to the right
• B) 0.48 N to the left
• C) 0.32 N to the left
• D) 0.32 N to the right
• E) None of the above

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Definitions:

Well-structured Problem

Refers to problems that have clearly defined goals, constraints, and solution paths, making them easier to solve through logical processes.

Uncertainty

A situation where the outcomes or consequences of actions are unpredictable or unknown.

Well-structured Problem

A problem characterized by a clear goal, known solution paths, and definite criteria for evaluating solutions.

Uncertainty

A condition of limited knowledge where it is impossible to exactly describe existing states, future outcomes, or their probabilities.