1
TG EAPCET 2025 (Online) 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

20 kV electrons can produce X- rays with a minimum wavelength of

A

$0.248 \mathop {\rm{A}}\limits^{\rm{o}}$

B

$0.41 \mathop {\rm{A}}\limits^{\rm{o}}$

C

0.099 nm

D

0.062 nm

2
TG EAPCET 2025 (Online) 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The ratio of wavelengths of second line in Balmer series and the first line in Lyman series of hydrogen atom is

A

$2: 1$

B

$9: 4$

C

$4: 1$

D

$3: 2$

3
TG EAPCET 2025 (Online) 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

A radioactive material of half-life 2.5 hours emits radiation that is 32 times the safe maximum level. The time (in hours) after which the material can be handled safely is

A

10

B

25

C

5

D

12.5

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

If the number of uranium nuclei required per hour to produce a power of 64 kW is $7.2 \times 10^{18}$, then the energy released per fission is

A

$0.64 \times 10^{-10} \mathrm{~J}$

B

$3.2 \times 10^{-13} \mathrm{~J}$

C

$0.32 \times 10^{-10} \mathrm{~J}$

D

$3.2 \times 10^{-10} \mathrm{~J}$

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