- 1. He discovered that electric field (manifested through its effect on charge, i.e., current) generate magnetic field
A) Hanz Christian Oersted
B) Hans Christian Oersted
C) Hans Christian Oarsted
- 2. The idea that the converse might also be true the magnetic field can also generate an electric field was from
A) Michael Faraday
B) James Clerk Maxwell
C) Hans Christian Oersted
- 3. He state that “time varying magnetic field is to electric field” and “time-varying electric field is to magnetic field”
A) Michael Faraday
B) Hans Christian Oarsted
C) James Clerk Maxwell
- 4. is the production of an electromotive force across an electrical conductor in a changing magnetic field.
A) Electro magnetic induction
B) Magnetic flux
C) Electricity
D) Magnetism
- 5. The amount of voltage produced depends on the following EXCEPT:
A) Pressure
B) Shape of wire
C) Magnetism
D) Speed
- 6. The following are the properties of electromagnetic induction EXCEPT:
A) ANY change in magnetic field will induce a pressure
B) Electrical components such as inductors and transformers devices such as electric motors and generators
C) Traffic control signals
- 7. He first discovered way back in the 1830’s
A) James Clerk Maxwell
B) Michael Faraday
C) Hanz Christian Oersted
- 8. In his experiment, he noticed that when he moved a permanent magnet in and out of a coil or loop of wire Induced an electromotive force or emf , in other words a Voltage, and therefore a ________ was produced.
A) magnet
B) power
C) current
- 9. When there is no relative motion between the magnet and the coil, the magnetic flux within the coil remains _______.
A) moving
B) constant
C) deacresing
- 10. When the magnet is moved towards the coil or vice versa, the magnetic flux and electromotive force is _______ in the coil.
A) removed
B) induced
C) moving
D) stopped
- 11. Lenz’s law is based on _______________ of magnetic induction.
A) Faraday's Law
B) Physics
C) Gauss's law
D) Kinematics
- 12. Lenz’s law tells us the direction of this induced current, which opposes the initial changing magnetic field which produced it. This is signified in the formula for Faraday’s law by the ________ sign.
A) negative
B) positive
C) equal
- 13. Electromagnetism is when
A) electricity causes magnetism
B) magnetism causes electricity
C) electricity and magnetism cancel each other out
- 14. The voltmeter is at 0 in this image. How would you manipulate the experiment to create electricity (measured in volts)?
A) Take the magnet out
B) Move the magnet back and forth
C) Flip the magnet around so the North pole is facing out
- 15. Electromagnetic induction is taking place in this experiment. How much electricity is being produced?
A) 10 Volts
B) 100 Volts
C) This question cannot be answered based on this image
D) -10 Volts
- 16. How could the experimenter increase the amount of electricity being induced by this experiment?
A) Increase the number of coils
B) Decrease the number of coils
C) Flip the magnet around
- 17. How would flipping the magnet in this experiment change the current?
A) The current would go CRAZY
B) The current would not change
C) The current would go to the right
D) There would be no current
- 18. Electromagnetic induction is change in ___________________.
A) surface area
B) magnetic flux
C) magnetic poles
- 19. Voltage can be induced in a wire by
A) changing the current in a nearby wire.
B) all of these
C) moving a magnet near the wire.
D) moving the wire near a magnet.
- 20. What would happen if I move a bar magnet in and out of a coil of copper wire?
A) Electric current will flow through the wire
B) The magnet would explode
C) Electric current would disappear
- 21. Which activity will produce the highest current?
A) Move the magnet bar into the coil while the coil remains stationery
B) Move the coil into the magnet bar while the magnet remains stationery
C) Move the coil and magnet towards each other
- 22. In electromagnetic induction, what is being created?
A) Chemical energy
B) Electrical energy
C) Magnetism
- 23. When there is a change in the magnetic field in a closed loop of wire
A) all of these
B) electromagnetic induction occurs
C) a voltage is induced in the wire
D) current is made to flow in the loop of wire
- 24. It is the path for transmitting electric current.
A) Circuit in Parallel
B) Electric Circuit
C) Circuit in Series
- 25. A long coil of wire consisting of many loops of wire and making a complete circuit is called a _____________
A) electron flow
B) current
C) solenoid
- 26. If a piece of iron is placed inside the coil of wire, the magnetic field is greatly increased because the domains of the iron are aligned by the magnetic field of the current. This is called a _____________.
A) solenoid
B) magnet
C) electromagnet
- 27. An electromagnet is stronger if there are more turns in the coil of ___________
A) magnets
B) clapper
C) wire
- 28. What would happen with the magnets in the picture above?
A) They would repel
B) They would attract
- 29. Magnetic field is a scalar quantity.
A) false
B) true
- 30. What is an electromagnet?
A) a permanent magnet with a north and south pole
B) a temporary magnet made from current carrying wire around a magnetic metal core.
- 31. Which materials are magnetic?
A) Aluminium
B) Zinc
C) Cobalt
D) Wood
- 32. are transverse waves with a wide range of properties and uses.
A) Electromagnetism
B) Electromagnetic waves
C) Electromagnet
- 33. Electromagnetic waves travel at _________ meters per second (m/s) through a vacuum.
A) 300,000,000
B) 360,000,000
C) 300,000
- 34. the longest of the wavelengths, measures around 700 nanometers;
A) red
B) blue
C) yellow
- 35. the shortest, is around 400 nanometers in length.
A) violet
B) yellow
C) red
D) green
- 36. Electromagnetic waves have crests and troughs similar to those of ocean waves.
A) wavelength
B) energy
C) frequency
- 37. It is the number of occurrences of a repeating event per unit of time.
A) wavelength
B) energy
C) frequency
- 38. Which type of electromagnetic radiation is the reason we need sunglasses and sunscreen to avoid getting a sunburn?
A) Gamma Rays
B) Ultraviolet waves
C) X-rays
- 39. Which section of the spectrum is the ONLY one we can see?
A) X-rays
B) Visible Light
C) Ultraviolet Rays
- 40. Maxwell's calculation of the speed of an electromagnetic wave included two important constants:
A) the permittivity and permeability of free space.
B) the velocity and permeability of free space.
C) the permittivity and motion of free space.
- 41. The intensity of light transmitted through the analyzer is given by _____.
A) Malus' law
B) Faraday's law
C) Lenz's law
- 42. is the height of the
wave, usually measured in meters.
A) Amplitude
B) Frequency
C) Wavelength
D) Period
- 43. The angle of incidence and angle of refraction are mathematically related to the index of refraction of each material through the Law of Refraction, also called
________.
A) Snell’s Law.
B) Lenz's Law
C) Malus' law
- 44. are smooth reflecting surfaces usually made up of polished metal
or glass that has been coated with some metallic substance.
A) Glass
B) Metal
C) Mirrors
- 45. are mirrors with a flat
surface.
A) Concave mirrors
B) Plane mirrors
C) Spherical mirrors
- 46. are mirrors that
have surfaces which are sections of a
sphere.
A) Spherical mirrors
B) Plane mirrors
C) Concave mirrors
- 47. the point where the mirror crosses the principal axis.
A) Focus
B) Principal axis
C) vertex
- 48. the radius of the sphere; the distance between C and V.
A) Focus
B) Radius of Curvature (R)
C) Vertex
D) Principal axis
- 49. the image that appears on the screen; light rays converge at the location of the object
A) virtual image
B) real image
- 50. the image that cannot be displayed on the screen; light rays converge at the location of the image
A) virtual image
B) real image
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