9. Magnetic Fields.md

2024-4-11|2024-4-12
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Here is the converted quiz with blank underlines for the answers:
20.1 Concept of a Magnetic Field
  1. Conceptual Understanding: What is a magnetic field, and what are the two primary sources that produce it?  Answer:
  1. Representation: Describe how magnetic field lines are used to represent a magnetic field and state what the properties of these lines represent.  Answer:
20.2 Force on a Current-Carrying Conductor
  1. Conceptual Understanding: When does a force act on a current-carrying conductor in a magnetic field?  Answer:
  1. Formula Dictation and Application: State the formula that describes the force on a current-carrying conductor in a magnetic field, and calculate the force exerted on a 2-meter-long wire carrying a current of 3 A at a right angle to a magnetic field with a flux density of 0.5 T.  Answer:
  1. Definition Dictation: Define magnetic flux density and explain its significance in relation to a current-carrying conductor in a magnetic field.  Answer:
20.3 Force on a Moving Charge
  1. Direction Determination: How can the direction of the force on a charge moving in a magnetic field be determined?  Answer:
  1. Formula Dictation and Application: State the formula for the force on a moving charge in a magnetic field and calculate the force on a proton moving at \(2 \times 10^6\) m/s perpendicular to a magnetic field of strength \(1.5 \times 10^{-2}\) T.  Answer:
  1. Hall Effect: Explain the origin of the Hall voltage and derive the expression for the Hall voltage \(VH = \frac{BI}{ntq}\), where \(t\) is the thickness.  Answer:
  1. Hall Probe: Describe how a Hall probe can be used to measure magnetic flux density.  Answer:
  1. Charged Particle Motion: Describe the motion of a charged particle moving in a uniform magnetic field when the particle's velocity is perpendicular to the field.  Answer:
  1. Velocity Selection: Explain how electric and magnetic fields can be used in velocity selection.  Answer:
Section 20: Magnetic Fields
20.4 Magnetic Fields Due to Currents
  1. Magnetic Field Patterns: Sketch the magnetic field patterns for the following current-carrying conductors: a long straight wire, a flat circular coil, and a long solenoid.  Answer:
  1. Solenoid with a Ferrous Core: Explain how the magnetic field due to the current in a solenoid is affected by introducing a ferrous core.  Answer:
  1. Forces Between Conductors: Explain the origin of the forces between current-carrying conductors and determine the direction of these forces.  Answer:
20.5 Electromagnetic Induction
  1. Magnetic Flux: Define magnetic flux and state its units.  Answer:
  1. Magnetic Flux Calculation: Recall and use the equation \(\Phi = BA\) to calculate the magnetic flux through a surface area of 0.02 m² in a uniform magnetic field of 0.5 T.  Answer:
  1. Magnetic Flux Linkage: Understand and use the concept of magnetic flux linkage.  Answer:
  1. Electromagnetic Induction Experiments: Understand and explain experiments that demonstrate electromagnetic induction, including the factors affecting the magnitude of the induced e.m.f.  Answer:
  1. Faraday’s and Lenz’s Laws: Recall and use Faraday’s and Lenz’s laws of electromagnetic induction.  Answer:
Physics
10. Alternating Currents A.md9. Magnetic Fields A.md
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