TS EAMCET 2022 (Online) 19th July Morning Shift | Units & Measurement and Dimensions Question 19 | Physics

A physical quantity $S$ is related to four observables $a, b, c$ and $d$ as $S=\frac{\sqrt{a b}}{c^3 d^4}$. If the percentage errors of measurement in $a, b, c$ and $d$ are $2 \%, 1 \%, 1 \%$ and $1 \%$ respectively, then percentage error in the quantity $S$ is

$6 \%$

$8 \%$

$9 \%$

$10 \%$

TS EAMCET 2022 (Online) 18th July Evening Shift

MCQ (Single Correct Answer)

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In a $R$ - $C$ circuit, where $R$ is resistance and $C$ is capacitance, which of the following has the dimension of time?

$R / C$

$C / R$

$\sqrt{R C}$

$R C$

TS EAMCET 2022 (Online) 18th July Morning Shift

MCQ (Single Correct Answer)

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Choose the correct statement from following.

Not all basic laws of physics are universal.

Conservation laws have a deep connection with symmetries of nature.

There are four to six fundamental forces in nature that govern the diverse phenomena of the world.

Physics can generate new technology but new physics cannot come out from technology.

TS EAMCET 2022 (Online) 18th July Morning Shift

MCQ (Single Correct Answer)

-0

If $E$ and $E_0$ denote energies at time $t$ and $t_0$ respectively, and $L$ and $L_0$ distance from same point at $t$ and $t_0$ respectively, then which of the following equations can be declared to be incorrect on dimensional grounds? (A) $E=\frac{2 E_0 L}{L_0}$ (B) $E=E_0 e^{-2 L / L_0}$ (C) $E=2 L e^{-L / E_0}$ (D) $E=2\left(E_0 / L_0\right) \times e^{-L / L_0}$

A, B only

A, C only

A, C, D only

C, D only

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