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electric field strength
force per unit positive charge
1 of 24
magnetic flux density
flux density perpendicular to a wire = magnetic force on a wire/(length of wire × current flowing through wire)
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tesla
1 tesla = the flux density that causes a force of one newton on a wire of length one meter carrying a current of one amp
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magnetic flux
magnetic flux = magnetic flux density × cross sectional area perpendicular to magnetic field
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weber
1 weber = the flux due to a flux density of one tesla passing through an area of one m^2
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magnetic flux linkage
flux linkage to a coil = flux passing through one turn × number of turns
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Faraday's law of electromagnetic induction
induced E.M.F. is proportional to the rate of change of magnetic flux
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capacitance
charge per unit potential difference
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farad
coulomb per volt
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time constant
time for the charge to fall by a factor of e
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proton number
number of protons in a nucleus
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isotopes
nuclei with the same proton number but different nucleon numbers
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activity
number of decays per unit time
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decay constant
the probability of decay of a nucleus per unit time
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half life
the time for the activity of a sample to half
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binding energy
minimum energy to separate all nucleons of a nucleus
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binding energy per nucleon
minimum energy to separate all nucleons of a nucleus divided by the number of nucleons in the nucleus
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Hubble's law
the speed of recession of a galaxy is proportional to its distance from the observer
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the cosmological principle
on a large scale the universe is uniform (isotropic and homogeneous)
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critical density
the density for which the rate of expansion of the universe tends to zero
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AU
mean distance between the earth and sun
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parsec
distance from a base length of AU that subtends an angle of 1 arcsecond
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light-year
the distance traveled at the speed of light in one year
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intensity
power per unit cross-sectional area
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Other cards in this set

Card 2

Front

flux density perpendicular to a wire = magnetic force on a wire/(length of wire × current flowing through wire)

Back

magnetic flux density

Card 3

Front

1 tesla = the flux density that causes a force of one newton on a wire of length one meter carrying a current of one amp

Back

Preview of the back of card 3

Card 4

Front

magnetic flux = magnetic flux density × cross sectional area perpendicular to magnetic field

Back

Preview of the back of card 4

Card 5

Front

1 weber = the flux due to a flux density of one tesla passing through an area of one m^2

Back

Preview of the back of card 5
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