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1
KCET 2019
MCQ (Single Correct Answer)
+1
-0

Which one of the following nuclei has shorter mean life?

KCET 2019 Physics - Atoms and Nuclei Question 18 English

A
A
B
B
C
C
D
Same for all
2
KCET 2019
MCQ (Single Correct Answer)
+1
-0

In Rutherford experiment, for head-on collision of $$\alpha$$-particles with a gold nucleus, the impact parameter is

A
zero
B
of the order of $$10^{-14} \mathrm{~m}$$
C
of the order of $$10^{-10} \mathrm{~m}$$
D
of the order of $$10^{-6} \mathrm{~m}$$
3
KCET 2019
MCQ (Single Correct Answer)
+1
-0

Frequency of revolution of an electron revolving in $$n$$th orbit of $$\mathrm{H}$$-atom is proportional to

A
$$\frac{1}{n^2}$$
B
$$n$$
C
$$n$$ independent of $$n$$
D
$$\frac{1}{n^3}$$
4
KCET 2019
MCQ (Single Correct Answer)
+1
-0

A hydrogen atom is ground state absorbs $$10.2 \mathrm{~eV}$$ of energy. The orbital angular momentum of the electron is increased by

A
$$1.05 \times 10^{-34} \mathrm{~Js}$$
B
$$2.11 \times 10^{-34} \mathrm{~Js}$$
C
$$3.16 \times 10^{-34} \mathrm{~Js}$$
D
$$4.22 \times 10^{-34} \mathrm{~Js}$$
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