1
TS EAMCET 2022 (Online) 18th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

The value of planck's constant, if the slope of the graph of stopping potential versus frequency of incident light is $4 \times 10^{-15} \mathrm{~V}$-s is (given charge of an electron $=1.6 \times 10^{-19} \mathrm{C}$ )

A

$6.0 \times 10^{-34} \mathrm{~J}-\mathrm{s}$

B

$62 \times 10^{-34} \mathrm{~J}-\mathrm{s}$

C

$6.4 \times 10^{-34} \mathrm{~J}-\mathrm{s}$

D

$6.6 \times 10^{-34} \mathrm{~J}-\mathrm{s}$

2
TS EAMCET 2022 (Online) 18th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

A beam of white light is incident normally on a plane surface absorbing 70\% of the light and reflecting the rest. If the incident beam carries 10 W of power, the force exerted by it on the surface is

A

$3.3 \times 10^{-8} \mathrm{~N}$

B

$4.33 \times 10^{-8} \mathrm{~N}$

C

$2.3 \times 10^{-8} \mathrm{~N}$

D

$3.53 \times 10^{-8} \mathrm{~N}$

3
TS EAMCET 2022 (Online) 18th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

If the series limit frequency of Balmer series is $v_B$, then the series limit frequency of the Brackett series is

A

$\frac{4 v_B}{25}$

B

$\frac{V_B}{9}$

C

$\frac{V_B}{4}$

D

$\frac{9 v_B}{4}$

4
TS EAMCET 2022 (Online) 18th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

Consider a nucleus ${ }_{30}^{60} \mathrm{X}$. Its approximate density is (take, $1 \mathrm{amu}=1.6 \times 10^{-27} \mathrm{~kg}, R_0=1.2 \times 10^{-15} \mathrm{~m}$ )

A

$12 \times 10^{18} \mathrm{~kg} / \mathrm{m}^3$

B

$18.5 \times 10^{19} \mathrm{~kg} / \mathrm{m}^3$

C

$3.3 \times 10^{16} \mathrm{~kg} / \mathrm{m}^3$

D

$22 \times 10^{17} \mathrm{~kg} / \mathrm{m}^3$

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