1
AP EAPCET 2021 - 19th August Evening Shift
MCQ (Single Correct Answer)
+1
-0

The de-Broglie wavelength associated with a proton under the influence of an electric potential of 100 V is

A
1.227 $$\mathop A\limits^o $$
B
2.86 pm
C
12.27 $$\mathop A\limits^o $$
D
1.146 $$\times$$ 10$$^{-21}$$ m
2
AP EAPCET 2021 - 19th August Evening Shift
MCQ (Single Correct Answer)
+1
-0

The ionisation potential of hydrogen atom is 13.6 V. How much energy need to be supplied to ionise the hydrogen atom in the first excited state?

A
13.6 eV
B
27.2 eV
C
3.4 eV
D
6.8 eV
3
AP EAPCET 2021 - 19th August Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following statement is correct?

A
The rest mass of the stable nucleus is less than the sum of the rest masses of its separated nucleons.
B
The rest mass of the stable nucleus is greater than the sum of the rest masses of its separated nucleons.
C
In nuclear fission energy is released by fusion of two nuclei of medium mass (approximate $$100 \mathrm{~amu}$$ ).
D
In nuclear fission energy is released by fragmentation of very low atomic mass nucleus.
4
AP EAPCET 2021 - 19th August Evening Shift
MCQ (Single Correct Answer)
+1
-0

The length of germanium rod is $$0.925 \mathrm{~cm}$$ and its area of cross-section is $$1 \mathrm{~mm}^2$$. If for germanium $$n_i=2.5 \times 10^{19} \mathrm{~m}^{-3}, \propto_n=0.19 \mathrm{~m}^2 / \mathrm{V}-\mathrm{s}, \propto_e=0.39 \mathrm{~m}^2 / \mathrm{V}$$-s, then the resistance of the rod is

A
$$2.5 \Omega$$
B
$$4.0 \Omega$$
C
$$5.0 \Omega$$
D
$$10.0 \Omega$$
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