Day 537: JEE Mains Physics

1. A.
   Both $A$ and $R$ are true but $R$ is NOT the correct explanation of $A$
2. B.
   Both $A$ and $R$ are true and $R$ is the correct explanation of $A$
3. C.
   $A$ is false but $R$ is true
4. D.
   $A$ is true but $R$ is false

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1. A.
   Pressure gradient per unit mass
2. B.
   Force per unit mass
3. C.
   Gravitational potential
4. D.
   Energy per unit mass

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1. A.
   In the ground state of Rutherford's model electrons are in stable equilibrium. While in Thomson's model electrons always experience a net-force.
2. B.
   An atom has a nearly continuous mass distribution in a Rutherford's model but has a highly non-uniform mass distribution in Thomson's model
3. C.
   A classical atom based on Rutherford's model is doomed to collapse.
4. D.
   The positively charged part of the atom possesses most of the mass in Rutherford's model but not in Thomson's model.

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1. A.
   4
2. B.
   8.4
3. C.
   2
4. D.
   6.2

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