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13 questions
Based on Maxwell starting points
Electric field lines:
Originate on positive charges and terminate on negative charges.
Originate on negative charges and terminate on positive charges.
Can be originated on either charges but terminates only on negative charges.
Form closed loops
Based on Maxwell starting points:
•Magnetic field lines :
always form closed loops – they do not begin or end anywhere.
they can form closed or open loops – they begin at specific point but end anywhere.
originate on south poles and terminate on north poles.
magnetis can be found as separate poles
One of Maxwell's starting points was
A varying magnetic field:
induces an emf and hence an electric field
induces only an emf
induces only an electric field
induces ultraviolet catastrophe
Based on Maxwell's starting points
•Magnetic fields are generated :
by moving charges or currents
by still charges
by chemical reactions
by summer and hot weather
Maxwell hypothesized that a changing electric field would produce a magnetic field. and edited which equation:
Gauss's Law
Faraday's Law
Ampere's Law
Magnetic flux through a closed loop formula
•Maxwell calculated the speed of light to be
3x108m/s.
3x104m/s.
speed of sound
fluctuating based on the temprature
Maxwell concluded that visible light and all other electromagnetic waves consist of fluctuating electric and magnetic fields, with each varying field inducing the other.
True
False
EM waves travel at the speed of light.
True
False
The ratio of the electric field to the magnetic field in an EM wave equals the speed of light.
True
False
EM waves carry both energy and momentum, which can be delivered to a surface.
True
False
Electromagnetic waves come in various forms.
•Visible light
•Infrared
•Radio
•X-rays
True
False
In general, which condition of motion MUST be met with regards to a charged particle if it is in the process of emitting electromagnetic waves?
Accelerates
Moves in a circle
Moves at constant velocity
Moves at the speed of light
When light (or other electromagnetic radiation) travels across a given region, which of the following
is/are oscillating?
I. Electric field
II. Magnetic field
III. Energy
I only
II only
III only
I and II only
I, II and III
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