1
TG EAPCET 2025 (Online) 4th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

In a photoelectric experiment, the slope of the graph drawn between stopping potential along $Y$-axis and frequency of incident radiation along $X$-axis is (Planck's constant $=6.6 \times 10^{-34} \mathrm{Js}$ )

A

$2.42 \times 10^{15} \mathrm{JsC}^{-1}$

B

$10.56 \times 10^{-15} \mathrm{JsC}^{-1}$

C

$4.125 \times 10^{-15} \mathrm{JsC}^{-1}$

D

$6.25 \times 10^{-20} \mathrm{JsC}^{-1}$

2
TG EAPCET 2025 (Online) 4th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The maximum wavelength of incident radiation required to ionize a hydrogen atom in its ground state is nearly

A

912 nm

B

$1215 \mathop {\rm{A}}\limits^{\rm{o}}$

C

$912 \mathop {\rm{A}}\limits^{\rm{o}}$

D

1215 nm

3
TG EAPCET 2025 (Online) 4th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

When an element ${ }_{90}^{232} \mathrm{Th}$ decays into ${ }_{82}^{208} \mathrm{~Pb}$, the number of $\alpha$ and $\beta^{-}$particles emitted respectively are

A

4,8

B

8,2

C

6,2

D

6, 4

4
TG EAPCET 2025 (Online) 4th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

During the disintegration of a radioactive nucleus of mass number 208 at rest, two alpha particles each with kinetic energy $E$ are emitted. The total kinetic energy of the emitted alpha particles and the daughter nucleus after the disintegration is

A

$\frac{51 E}{25}$

B

$\frac{51 E}{50}$

C

$\frac{52 E}{25}$

D

$\frac{26 E}{25}$

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