1
TS EAMCET 2023 (Online) 13th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The efficiency of an engine is given by $\eta=\frac{\alpha \beta}{\sin \theta} \cdot \log _e \frac{\beta x}{k T}$, where $\alpha$ and $\beta$ are constants. If $T$ is the absolute temperature, $k$ is Boltzmann constant, $\theta$ is angular displacement and $x$ is distance, then the incorrect statement is

A

Dimension of $\beta$ are same as that of force

B

Dimension of $\alpha^{-1} x$ are same as that of energy.

C

Dimension of $\eta^{-1} \sin \theta$ are same as that of $\alpha \beta$

D

Dimension of $\alpha$ are same as that of $\beta$

2
TS EAMCET 2023 (Online) 13th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A bird flies with a velocity $(t-2) \mathrm{ms}^{-1}$ along a straight line, where $t$ is the time in seconds. The distance covered by it in a time of 4 seconds is

A

2 m

B

4 m

C

6 m

D

8 m

3
TS EAMCET 2023 (Online) 13th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A car is travelling with linear velocity $v$ on a circular road of radius $r$. If its velocity is increasing at a rate of $a \mathrm{~ms}^{-2}$, then the resultant acceleration will be

A

$\sqrt{\left(\frac{v^2}{r^2}-a^2\right)}$

B

$\sqrt{\left(\frac{v^4}{r^2}+a^2\right)}$

C

$\sqrt{\left(\frac{v^4}{r^2}-a^2\right)}$

D

$\sqrt{\left(\frac{v^2}{r^2}+a^2\right)}$

4
TS EAMCET 2023 (Online) 13th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Two blocks of masses $w_1$ and $w_2$ are suspended from the ends of a light string passing over a smooth fixed pulley. If the pulley is pulled up with an acceleration $g$, then the tension in the string will be

A

$\frac{4 w_1 w_2}{w_1+w_2} g$

B

$\frac{2 w_1 w_2}{w_1+w_2} g$

C

$\frac{w_1 w_2}{w_1+w_2} g$

D

$\frac{w_1 w_2}{2\left(w_1+w_2\right)} g$

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