08 Jul physics multiple choice
physics multiple choice
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Science
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Asked: Jun 2nd, 2019
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Question Description
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An excited atom decays to its ground state and emits a photon of green light. If, instead, the atom decayed to an intermediate state, then the light emitted could be
blue.
red.
violet.
A nuclear process that has relatively few radioactive byproducts is
neither fission nor fusion.
fusion.
both fission and fusion.
The phenomenon of inducing voltage by changing the magnetic field around a conductor is called
electromagnetic induction.
Faraday’s induction.
transformer induction.
A motor takes ___________________ and turns it into ___________________.
electrical energy, mechanical energy
work, power
mechanical energy, electrical energy
Isotopes of the same element have the same
number of neutrons.
number of protons.
number of nucleons.
Which force field can deflect an electron, but never change its speed?
electric field
magnetic field
both electric and magnetic fields
What is the best way to describe the strong force?
an attractive magnetic force
a repulsive electric force
an attractive nuclear force
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According to Faraday’s law, what can you change in order to increase the induced voltage in a coil?
decrease the number of loops
decrease the rate at which the magnetic field changes
increase the cross-sectional area of each loop
When uranium (92 protons) ejects an alpha particle, the nucleus left behind has
92 protons.
90 protons.
94 protons.
What is the direction of the magnetic field outside a magnet?
from the north pole to the south pole
from the south pole to the north pole
from the north pole outward in all directions
In an electromagnetic wave, the electric and magnetic fields are _________ to each other and _________ to the direction of wave motion.
at right angles, perpendicular
parallel, at right angles
at right angles, parallel
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