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Is there a mistake in Nelson Thornes AQA Physics A txtbook? watch

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    On Page 257, the formula for electric potential is:

     V = \dfrac {Qq}{4\pi\epsilon_{0}r^2}

    Whereas on the formula sheet for physics it says:

     V = \dfrac {Q}{4\pi\epsilon_{0}r}

    It looks like the formula for "Force between two point charges", but that formula is above it, so I doubt it's a typo meaning it to say Force.

    Or am I just being daft?

    Thanks
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    (Original post by 2710)
    On Page 257, the formula for electric potential is:

     V = \dfrac {Qq}{4\pi\epsilon_{0}r^2}

    Whereas on the formula sheet for physics it says:

     V = \dfrac {Q}{4\pi\epsilon_{0}r}

    It looks like the formula for "Force between two point charges", but that formula is above it, so I doubt it's a typo meaning it to say Force.

    Or am I just being daft?

    Thanks
    Must be wrong, formula sheet never lies.
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    (Original post by TSB01)
    Must be wrong, formula sheet never lies.
    Or is this formula some form of adaptation? I just want to verify.

    Thanks
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    Formula sheet is correct. The other equation is the force between two charges.
    Books can sometimes be very wrong. Some of the questions on here lately are proof of that.
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    On page 157 in the table it says that beta radiation is less easily deflected in a magnetic field than alpha radiation, surely this is wrong?
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    (Original post by Musicinthedarkness)
    On page 157 in the table it says that beta radiation is less easily deflected in a magnetic field than alpha radiation, surely this is wrong?
    As betas are less massive than alpha they are more easily deflected by collisions in matter than the heavy alphas.
    In a magnetic field, the force deflecting them will depend on the charge they have and the speed. F=Bqv
    For alphas and betas with the same speed, the force on the alphas will be 2 times that of the beta. [charge +2 and -1] But the mass of the alpha is much much greater than the mass of a beta so the beta is more easily deflected.

    Looks like another typo.
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    (Original post by Stonebridge)
    As betas are less massive than alpha they are more easily deflected by collisions in matter than the heavy alphas.
    In a magnetic field, the force deflecting them will depend on the charge they have and the speed. F=Bqv
    For alphas and betas with the same speed, the force on the alphas will be 2 times that of the beta. [charge +2 and -1] But the mass of the alpha is much much greater than the mass of a beta so the beta is more easily deflected.

    Looks like another typo.
    Thought so! Thanks very much
 
 
 

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