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Home ‣ Electrical Engineering ‣ Magnetism and Electromagnetism Comments
  • Question

  • The induced voltage across a stationary conductor in a stationary magnetic field is


  • Options
  • A. zero
  • B. reversed in polarity
  • C. increased
  • D. decreased

  • Correct Answer
  • zero 

    • Magnetism and Electromagnetism problems

    Search Results

    • 1. The unit for permeability is

    • Options
    • A. Wb/At × m
    • B. At/m
    • C. At/Wb
    • D. Wb
      • Discuss
    • 2. Referring to the given circuit, determine VTH and RTH if a 68 Ω resistor is connected in parallel across R2 and R3.


    • Options
    • A. 3.3 V, 148 Ω
    • B. 330 mV, 148 Ω
    • C. 3.3 V, 68 Ω
    • D. 330 mV, 68 Ω
      • Discuss
    • 3. In a two-source circuit, one source acting alone produces 12 mA through a given branch. The other source acting alone produces 10 mA in the opposite direction through the same branch. The actual current through the branch is

    • Options
    • A. 22 mA
    • B. 12 mA
    • C. 10 mA
    • D. 2 mA
      • Discuss
    • 4. What is the Thevenin equivalent (VTH and RTH) for the circuit given?


    • Options
    • A. 6.4 V, 422 Ω
    • B. 6.4 V, 560 Ω
    • C. 6.4 V, 680 Ω
    • D. 30 V, 422 Ω
      • Discuss
    • 5. A 12 V source has an internal resistance of 90 Ω. If a load resistance of 20 Ω is connected to the voltage source, the load power, PL, is

    • Options
    • A. 2.38 mW
    • B. 2.38 W
    • C. 238 mW
    • D. 23.8 W
      • Discuss
    • 6. For a given wirewound core, an increase in current through the coil

    • Options
    • A. reverses the flux lines
    • B. decreases the flux density
    • C. increases the flux density
    • D. causes no change in flux density
      • Discuss
    • 7. If the cross-sectional area of a magnetic field increases, but the flux remains the same, the flux density

    • Options
    • A. increases
    • B. decreases
    • C. remains the same
    • D. doubles
      • Discuss
    • 8. The direction of a magnetic field within a magnet is

    • Options
    • A. from south to north
    • B. from north to south
    • C. back to front
    • D. front to back
      • Discuss
    • 9. When the speed at which a conductor is moved through a magnetic field is increased, the induced voltage

    • Options
    • A. increases
    • B. decreases
    • C. remains constant
    • D. reaches zero
      • Discuss
    • 10. The ability of a material to remain magnetized after removal of the magnetizing force is known as

    • Options
    • A. permeability
    • B. reluctance
    • C. hysteresis
    • D. retentivity
      • Discuss

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