The focal power of a lens has the dimensions

Important Questions on Units and Measurements

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Gamma Question Bank for Medical Physics>Chapter 2 - Units and Measurements>Assignment>Q 44

Which of the following is a dimensional constant?

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Gamma Question Bank for Medical Physics>Chapter 2 - Units and Measurements>Assignment>Q 45

The dimensions of solar constant (energy falling on earth per second per unit area) are

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Gamma Question Bank for Medical Physics>Chapter 2 - Units and Measurements>Assignment>Q 46

If the buoyant force $F$ acting on an object depends on its volume $V$ immersed in a liquid, the density $\rho$ of the liquid and the acceleration due to gravity $g$. The correct expression for $F$ can be

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Gamma Question Bank for Medical Physics>Chapter 2 - Units and Measurements>Assignment>Q 47

The potential energy $u$ of a particle varies with distance $x$ from a fixed origin as $u=\frac{A\sqrt{x}}{x+B}$, where $A$ and $B$ are constants. The dimensions of $A$ and $B$ are respectively

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Gamma Question Bank for Medical Physics>Chapter 2 - Units and Measurements>Assignment>Q 48

A physical quantity $P$ is given by the relation. $P=P_0{e}^{\left(-\alpha t^2\right)}$ If $t$ denotes the time, the dimensions of constant $\alpha$ are

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Gamma Question Bank for Medical Physics>Chapter 2 - Units and Measurements>Assignment>Q 49

The dimensions of potential energy of an object in mass, length and time are respectively

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Gamma Question Bank for Medical Physics>Chapter 2 - Units and Measurements>Assignment>Q 50

The amount of heat energy $Q$, used to heat up a substance depends on its mass $m$, its specific heat capacity $\left(s\right)$ and the change in temperature $\mathrm{\Delta }T$ of the substance. Using dimensional method, find the expression for $s$ is ( Given that $\left.\left[\mathrm{s}\right]=\left[{\mathrm{L}}^2{ \mathrm{T}}^{-2}{ \mathrm{K}}^{-1}\right]\right)$ is

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Gamma Question Bank for Medical Physics>Chapter 2 - Units and Measurements>Assignment>Q 1

The source of instrumental error is