mathslover
What is the ratio of potential energy to total energy o electron?
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mathslover
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@hartnn
mathslover
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@akash123 @ganeshie8 @UnkleRhaukus @lgbasallote
UnkleRhaukus
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total energy as in ; mass energy?
mathslover
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a) -2
b) 2
c) 1
d) -1
@UnkleRhaukus can't say exactly
UnkleRhaukus
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well i dont think negative energy makes much sense in this question
mathslover
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Yes, since total energy and potential energy both are \(-ve\) and their ratio will be positive... (for electron)
UnkleRhaukus
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how is either negative/?
mathslover
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well since :
2 potential energy = total energy
mathslover
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should the answer be 2 : 1 ? Well @UnkleRhaukus
In the case of electron, both are negative
UnkleRhaukus
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really?
mathslover
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yes...
UnkleRhaukus
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i dont know what you mean
mathslover
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total energy = -ve
potential energy = - ve
and hence : their ratio will be +ve
mathslover
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@hartnn and @lgbasallote any suggestions/ideas ?
Jemurray3
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I assume you're basing this on an electron orbiting a nucleus (which you need to say, otherwise this doesn't make any sense), in which case the virial theorem states that on the average,
\[2T = -U \]
where T is the kinetic energy and U is the potential energy. The total energy is thus
\[ E = T + U = -\frac{1}{2}U + U = \frac{1}{2}U \]
mathslover
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OK very right .. so the answer is 2 ?
Jemurray3
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The ratio of total energy to potential energy is 1/2, but the ration of potential energy to total energy is 2.
Jemurray3
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ratio*
mathslover
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lol I changed the question wrong
mathslover
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thanks @Jemurray3