Refer To: Ref 22-2 Which one of the following statements concerning this situation is true? Since the circuit moves with constant speed, the force F does zero work. The induced current flows clockwise around the circuit. As the circuit moves through the field, the field does work to produce the current. If the circuit were replaced with a wooden loop, there would be no induced emf. The temperature of the circuit remains constant.
Refer To: Ref 22-2 Which one of the following statements concerning this situation is true? Since the circuit moves with constant speed, the force F does zero work. The induced current flows clockwise around the circuit. As the circuit moves through the field, the field does work to produce the current. If the circuit were replaced with a wooden loop, there would be no induced emf. The temperature of the circuit remains constant.
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Transcribed Image Text:**Physics Quiz Question: Induced Current and Electromagnetic Fields**
**Refer To: Ref 22-2**
**Question:**
Which one of the following statements concerning this situation is true?
**Options:**
1. Since the circuit moves with constant speed, the force **F** does zero work.
2. The induced current flows clockwise around the circuit.
3. As the circuit moves through the field, the field does work to produce the current.
4. If the circuit were replaced with a wooden loop, there would be no induced emf.
5. The temperature of the circuit remains constant.
Transcribed Image Text:### Analyzing the Motion of a Circuit in a Magnetic Field
**Problem Statement:**
A circuit is pulled with a 21-N force toward the right to maintain a constant speed \( v \). At the instant shown, the loop is partially in and partially out of a uniform magnetic field that is directed into the paper. As the circuit moves, a 4.0-A current flows through a 6.0-Ω resistor.
**Explanation:**
The given diagram illustrates a rectangular circuit with a resistor \( R \) being moved to the right. The circuit partially lies in a region with a uniform magnetic field, which is depicted by the crosses (\(\bigotimes\)) symbolizing a magnetic field directed into the plane of the paper.
- **Circuit Components:**
- **Resistor \( R \)**: Denoted with a resistance value of \( 6.0 \ \Omega \).
- **Current Flow \( I \)**: A current of \( 4.0 \ \text{A} \) flows through the resistor.
- **Magnetic Field Direction**: Indicated by the \( \bigotimes \) symbols, showing that the magnetic field is oriented into the plane of the paper.
- **Applied Force:**
- A force of \( 21 \ \text{N} \) is applied towards the right to keep the circuit moving at a constant velocity \( v \).
**Key Points:**
1. **Magnetic Field Interaction:**
- As the circuit moves to the right, it experiences a change in magnetic flux due to its motion out of the magnetic field region. This change in flux induces an electromotive force (emf) according to Faraday's Law.
2. **Current and Resistance:**
- The induced emf drives a current of \( 4.0 \ \text{A} \) through the circuit, encountering a total resistance of \( 6.0 \ \Omega \).
3. **Force and Motion:**
- The constant speed implies a balance of forces, where the magnetic force generated by the interaction of the current and magnetic field (Lorentz force) balances the pulling force of \( 21 \ \text{N} \).
**Diagram Description:**
The diagram shows a rectangular loop with the following key features:
- The left segment of the loop is partially immersed in a shaded region representing the magnetic field area.
- The field lines (cross
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