1
TG EAPCET 2024 (Online) 9th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
If the de-Broglie wavelength of a neutron at a temperature of $77^{\circ} \mathrm{C}$ is $\lambda$, then the de-Broglie wavelength of the neutron at a temperature of $1127^{\circ} \mathrm{C}$ is
A
$\frac{\lambda}{2}$
B
$\frac{\lambda}{3}$
C
$\frac{\lambda}{4}$
D
$\frac{\lambda}{9}$
2
TG EAPCET 2024 (Online) 9th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
The ratio of the wavelengths of radiation emitted when an electron in the hydrogen atom jumps from 4th orbit to 2 nd orbit and from 3rd orbit to 2 nd orbit is
A
$27: 25$
B
$20: 25$
C
$20: 27$
D
$25: 27$
3
TG EAPCET 2024 (Online) 9th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
The half lives of two radioactive material $A$ and $B$ are respectively $T$ and $2 T$. If the ratio of the initial masses of the materials $A$ and $B$ is $8: 1$. Then, the time after which the ratio of the masses of the materials $A$ and $B$ becomes $4: 1$ is
A
$2 T$
B
$T$
C
$4 T$
D
$8 T$
4
TG EAPCET 2024 (Online) 9th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
The energy released by the fission of one uranium nucleus is 200 MeV . The number of fissions per second required to produce 128 W power is
A
$6 \times 10^{12}$
B
$8 \times 10^{12}$
C
$2 \times 10^{12}$
D
$4 \times 10^{12}$.
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