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20 questions
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  • Q1

    The phenomenon of inducing a voltage by changing the magnetic field around a conductor is called __________.

    electromagnetic induction

    transformer induction

    Faraday’s induction     

    generated voltage

    300s
  • Q2

    By accelerating the magnet inside the coil, the current in it will _________.

    decrease

    increase

    remain constant

    reverse

    300s
  • Q3

    A square loop of wire with 10 turns and a side length of 1 m is placed in a changing magnetic field. If the magnetic field changes from 2 T to 4 T within 8 seconds, what is the average induced emf?

    2.90 V

    0.648 V

    2.50 V

    0.226 V

    300s
  • Q4

    A 500-turn solenoid develops an average induced voltage of 60 V. Over what time interval must a flux change by 0.06 Wb occur to produce such a voltage?

    5 s

    0.5 s

    0.1 s

    0.01 s

    300s
  • Q5

    Faraday’s laws of electromagnetic induction are related to:

    the strength of a magnetic field

    the electromagnetic field of a generator

    the electromagnetic field of a chemical cell

    the current flowing in a conductor

    300s
  • Q6

    How can you tell one form of electromagnetic energy from another?

    amplitude

    speed

    color

    wavelength     

    300s
  • Q7

    The region of the electromagnetic spectrum where humans can detect electro magnetic radiation is____________.

    X-ray

    ultraviolet

    infrared

    visible light

    300s
  • Q8

    Electro magnetic energy can be described by ____________.

    amplitude

    energy and frequency

    amplitude, frequency and speed

    speed

    300s
  • Q9

    Which of the following color has the longest wavelength?

    red

    green

    yellow

    blue

    300s
  • Q10

    In _______, a wave reaches a boundary and changes direction as it passes into another medium

    refraction        

    reflection

    interference

    diffraction

    300s
  • Q11

    Which describes the refracted ray when light at a certain angle passes from a less dense to a denser medium?

    The refracted ray is in the normal line.

    Light travels straight on.

    The refracted ray moves away from the normal line.

    The refracted ray moves towards the normal line.

    300s
  • Q12

    A ray of light travels from air into liquid at an angle of incidence of 30degrees. If it is deviated by 10 degrees, what is the index of refraction of light in the liquid?

    1.2      

    1.35

    3.9

    1.5

    300s
  • Q13

    Suppose a layer of oil (refractive index is 1.45) floats on water (refractive index is1.33). If a ray of light shines onto the oil with an incidence angle of 40 degrees , what is the angle formed between the ray and the surface of the water?

    26.2 degrees

    28.9 degrees

    25.4 degrees

    26.9 degrees

    300s
  • Q14

    How a ray is refracted at the interface between two materials of different indices or refraction (n1 and n2) is given by __________.

    Snell’s Law     

    Lenz Law

    Huygen’s Principle

    Malus’ Law

    300s
  • Q15

    It is the force of attraction and repulsion of a magnetic material due to the arrangement of its atoms, particularly its atoms.

    Electricity

    Electromagnetism

    Magnetism

    Induction

    300s

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