- 1. He discovered that electric field (manifested through its effect on charge, i.e., current) generate magnetic field
A) Hans Christian Oersted
B) Hanz 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) Hans Christian Oersted
B) Michael Faraday
C) James Clerk Maxwell
- 3. He state that “time varying magnetic field is to electric field” and “time-varying electric field is to magnetic field”
A) James Clerk Maxwell
B) Michael Faraday
C) Hans Christian Oarsted
- 4. is the production of an electromotive force across an electrical conductor in a changing magnetic field.
A) Magnetism
B) Electro magnetic induction
C) Electricity
D) Magnetic flux
- 5. The amount of voltage produced depends on the following EXCEPT:
A) Shape of wire
B) Magnetism
C) Pressure
D) Speed
- 6. The following are the properties of electromagnetic induction EXCEPT:
A) ANY change in magnetic field will induce a pressure
B) Traffic control signals
C) Electrical components such as inductors and transformers devices such as electric motors and generators
- 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) current
B) magnet
C) power
- 9. When there is no relative motion between the magnet and the coil, the magnetic flux within the coil remains _______.
A) moving
B) deacresing
C) constant
- 10. When the magnet is moved towards the coil or vice versa, the magnetic flux and electromotive force is _______ in the coil.
A) moving
B) induced
C) stopped
D) removed
- 11. Lenz’s law is based on _______________ of magnetic induction.
A) Gauss's law
B) Kinematics
C) Physics
D) Faraday's Law
- 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) equal
B) negative
C) positive
- 13. Electromagnetism is when
A) electricity causes magnetism
B) electricity and magnetism cancel each other out
C) magnetism causes electricity
- 14. The voltmeter is at 0 in this image. How would you manipulate the experiment to create electricity (measured in volts)?
A) Move the magnet back and forth
B) Take the magnet out
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) Decrease the number of coils
B) Flip the magnet around
C) Increase the number of coils
- 17. How would flipping the magnet in this experiment change the current?
A) There would be no current
B) The current would go to the right
C) The current would not change
D) The current would go CRAZY
- 18. Electromagnetic induction is change in ___________________.
A) magnetic poles
B) surface area
C) magnetic flux
- 19. Voltage can be induced in a wire by
A) moving the wire near a magnet.
B) changing the current in a nearby wire.
C) moving a magnet near the wire.
D) all of these
- 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 coil into the magnet bar while the magnet remains stationery
B) Move the coil and magnet towards each other
C) Move the magnet bar into the coil while the coil remains stationery
- 22. In electromagnetic induction, what is being created?
A) Magnetism
B) Electrical energy
C) Chemical energy
- 23. When there is a change in the magnetic field in a closed loop of wire
A) all of these
B) a voltage is induced in the wire
C) electromagnetic induction occurs
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) Circuit in Series
C) Electric Circuit
- 25. A long coil of wire consisting of many loops of wire and making a complete circuit is called a _____________
A) current
B) electron flow
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) electromagnet
B) magnet
C) solenoid
- 27. An electromagnet is stronger if there are more turns in the coil of ___________
A) clapper
B) magnets
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) true
B) false
- 30. What is an electromagnet?
A) a temporary magnet made from current carrying wire around a magnetic metal core.
B) a permanent magnet with a north and south pole
- 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) 360,000,000
B) 300,000
C) 300,000,000
- 34. the longest of the wavelengths, measures around 700 nanometers;
A) yellow
B) blue
C) red
- 35. the shortest, is around 400 nanometers in length.
A) red
B) violet
C) yellow
D) green
- 36. Electromagnetic waves have crests and troughs similar to those of ocean waves.
A) frequency
B) wavelength
C) energy
- 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) X-rays
C) Ultraviolet waves
- 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 motion of free space.
B) the permittivity and permeability of free space.
C) the velocity and permeability of free space.
- 41. The intensity of light transmitted through the analyzer is given by _____.
A) Lenz's law
B) Malus' law
C) Faraday's law
- 42. is the height of the
wave, usually measured in meters.
A) Wavelength
B) Period
C) Amplitude
D) Frequency
- 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) Malus' law
C) Lenz's Law
- 44. are smooth reflecting surfaces usually made up of polished metal
or glass that has been coated with some metallic substance.
A) Metal
B) Glass
C) Mirrors
- 45. are mirrors with a flat
surface.
A) Concave mirrors
B) Spherical mirrors
C) Plane mirrors
- 46. are mirrors that
have surfaces which are sections of a
sphere.
A) Concave mirrors
B) Spherical mirrors
C) Plane 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) Radius of Curvature (R)
B) Principal axis
C) Focus
D) Vertex
- 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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