MCQ_SINGLE

Two planets $P_{1}$ and $P_{2}$ with equal mass have radii $R_{1}$ and $R_{2}$, respectively, where $R_{2}=\frac{R_{1}}{2}$. The escape speeds of $P_{1}$ and $P_{2}$ are $v_{1}$ and $v_{2},$ respectively. Then $\frac{v_{2}}{v_{1}}$ is:

MCQ_SINGLE

Consider a fixed uniformly charged insulating sphere with radius R and total charge +Q. A point charge -q $(q

MCQ_SINGLE

Which of the following statements is incorrect?

MCQ_SINGLE

Sponges exchange $O_{2}$ with $CO_{2}$ by

MCQ_SINGLE

A beam of light falls on a metal surface such that photo-electrons are generated. If power of the light source starts to decrease linearly with time t, then variation of the photocurrent I and magnitude of the stopping potential V with time is best represented by: [Image Placeholder]

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