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Electromagnetic induction electron motion and oscilloscope

Quiz by Adrian Haigh

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30 questions
Show answers
  • Q1
    What is the principle behind electromagnetic induction?
    Mechanical forces generate electric fields
    A changing magnetic field induces an electromotive force (EMF)
    Static magnetic fields can induce electric fields
    An electric current induces a magnetic field
    30s
  • Q2
    Which law describes the induced EMF in a closed loop due to a changing magnetic flux?
    Lenz's Law
    Ohm's Law
    Faraday's Law of Electromagnetic Induction
    Ampere's Law
    30s
  • Q3
    What is Lenz's Law in the context of electromagnetic induction?
    It states that the direction of induced EMF will be such that it opposes the change in magnetic flux.
    It states that any induced current will dissipate energy
    It states that induced currents are always in the same direction as the magnetic field
    It states that EMF can only be produced by a constant magnetic field
    30s
  • Q4
    What is the formula for calculating the induced EMF according to Faraday's Law?
    EMF = Q/V
    EMF = I * R
    EMF = -dΦ/dt
    EMF = B * v * L
    30s
  • Q5
    In an AC generator, what type of motion is primarily used to induce EMF?
    Translational motion
    Helical motion
    Rotational motion
    Linear motion
    30s
  • Q6
    What is the effect of increasing the number of turns in a coil on the induced EMF in a magnetic field?
    The induced EMF remains constant
    The induced EMF becomes zero
    The induced EMF decreases
    The induced EMF increases
    30s
  • Q7
    What type of current is produced by a generator that operates based on electromagnetic induction?
    Alternating current (AC)
    Pulsating current
    Direct current (DC)
    Static current
    30s
  • Q8
    What occurs when a conductor moves through a magnetic field while keeping a constant speed?
    No EMF is generated
    An induced EMF is generated in the conductor
    The magnetic field increases
    The resistance of the conductor decreases
    30s
  • Q9
    Which of the following factors does NOT affect the magnitude of the induced EMF?
    The rate of change of magnetic flux
    The strength of the magnetic field
    The length of the conductor
    The speed of the conductor's motion
    30s
  • Q10
    In a transformer, what is the primary purpose of the core made from iron or steel?
    To convert AC to DC
    To enhance the magnetic coupling between the primary and secondary coils
    To increase electrical resistance
    To support the physical structure of the transformer
    30s
  • Q11
    What is the direction of the force acting on an electron moving in a magnetic field?
    In the same direction as the velocity
    In the opposite direction of the magnetic field
    Parallel to the magnetic field
    Perpendicular to both the velocity of the electron and the magnetic field
    30s
  • Q12
    What happens to the radius of the path of an electron when its speed increases while moving in a uniform magnetic field?
    The radius of the path becomes zero
    The radius of the path increases
    The radius of the path decreases
    The radius of the path remains the same
    30s
  • Q13
    What is the effect on an electron's trajectory when it enters a magnetic field at an angle?
    It experiences a curved path
    It continues in a straight line
    It starts to accelerate in a straight line
    It is instantaneously stopped
    30s
  • Q14
    Which of the following describes the force experienced by an electron moving parallel to the magnetic field lines?
    The force acts opposite to the direction of motion
    The force is maximal
    The force acts perpendicular to the motion
    The force is zero
    30s
  • Q15
    What determines the direction of the magnetic force acting on an electron in a magnetic field?
    The right-hand rule
    The left-hand rule
    The angle of incidence
    The electron's charge only
    30s

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