MCQ_SINGLE

An air-filled capacitor of capacitance $C$ is filled with a dielectric $(k=3)$ of width $\frac{d}{3}$, where $d$ is the separation between the plates. The new capacitance is:

MCQ_SINGLE

Find dimensions of $\frac{A}{B}$ if $(P+\frac{A^{2}}{B})+\frac{1}{2}\rho V^{2}=$ constant, where $P\rightarrow$ pressure, $\rho\rightarrow$ density, $V$ speed.

MCQ_SINGLE

Ratio of de-Broglie wavelengths of a proton and an alpha particle accelerated through the same potential is:

MCQ_SINGLE

Find the heat produced in the external circuit (AB) in one second (refer to circuit diagram).

MCQ_SINGLE

An $\alpha$-particle having kinetic energy $7.7 MeV$ is approaching a fixed gold nucleus (atomic number $Z=79$). Find the distance of closest approach.

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