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A metal rod moves with constant velocity along two parallel metal rails connected with
strip of metal at one side as shown in Figure. A magnetic field B = 0.35 T points out
of the page. If the rails are separated by distance ZL = 25 cm and the speed of the rod is
v= 55 cm/s, find
a) the induced emf and direction of induced current
b) the amount of heat released in this system in 3 min if the rod has resistance of 18 Q
and the rails have negligible resistance.
Transcribed Image Text:### Explanation of the Diagram:
The diagram represents a physical scenario likely involving electromagnetic fields and motion. Here’s a detailed breakdown of the components and what they signify:
1. **Rectangular Region**: The overall shape of the representation is a rectangle, indicating a specific area for the scenario.
2. **Large 'B'**: The letter 'B' inside the rectangle possibly indicates the presence of a magnetic field. In physics, 'B' commonly denotes magnetic field strength or magnetic flux density.
3. **Closed Circles with Dots (•) in the Center**: These circles likely represent magnetic field lines or possibly charged particles within this magnetic field. The dots inside the circles are indicative of the magnetic field direction, perpendicular to the plane of the page (going into or coming out of the page).
4. **Barrier with Velocity Arrow (v)**: A shaded or hatched vertical line near one end of the rectangle represents a barrier. Adjacent to this barrier, there is an arrow labeled 'v,' which indicates velocity or the direction of motion. The arrow points to the left, suggesting movement towards that direction.
5. **Length Indicator labeled 'L'**: A double-headed vertical arrow across the right end of the rectangle shows the length, labeled 'L.' This symbol denotes the spatial extent in that dimension.
### Educational Context and Implications:
In an educational context, this diagram could serve various purposes:
- **Illustration of Electromagnetic Theory**: It could be used to explain the interaction between magnetic fields and conductive materials moving within them, demonstrating concepts such as electromagnetic induction.
- **Motion of Conductive Materials in Magnetic Fields**: The setup might be an example of Lorentz force, which is the force experienced by a charged particle in a magnetic field due to its motion. This is highly relevant in physics and engineering topics.
- **Magnetic Flux and Faraday's Law**: The diagram might help to illustrate Faraday's Law of Induction, which states that a change in magnetic flux through a loop induces an electromotive force (EMF) in the conductor.
This type of diagram is essential for students to understand the real-world applications of the theoretical aspects of electromagnetism, providing visual aid to complex phenomena.
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