Day 174: MHT-CET Physics

1. A.
   $\frac{1}{\sqrt{2}}$
2. B.
   $\frac{2}{\sqrt{5}}$
3. C.
   $\frac{2}{\sqrt{10}}$
4. D.
   $\frac{2}{\sqrt{15}}$

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1. A.
   At time t=0, the energy stored circuit is purely in the form of magnetic energy.
2. B.
   At t>0, there is no exchange of energy between L and C.
3. C.
   At any time t>0, the current in the circuit is in the same direction.
4. D.
   At any time t>0, the instantaneous current in the circuit may be $V\sqrt{\frac{C}{L}}$

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1. A.
   Charge remains constant after it is isolated.
2. B.
   Potential difference across the plates decreases.
3. C.
   Potential difference across the plates increases.
4. D.
   Capacitance of capacitor decreases.

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1. A.
   $2\pi\times10^{-4}$
2. B.
   $2.4\pi\times10^{-4}$
3. C.
   $4\pi\times10^{-4}$
4. D.
   $4.8\pi\times10^{-4}$

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1. A.
   $\frac{\alpha_i}{\alpha_c+\alpha_i}$
2. B.
   $\frac{\alpha_c}{\alpha_c+\alpha_i}$
3. C.
   $\frac{\alpha_i-\alpha_c}{\alpha_c+\alpha_i}$
4. D.
   $\frac{\alpha_c-\alpha_i}{\alpha_c+\alpha_i}$

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