147572
What happens to the mass number and atomic number of an element when it emits $\gamma$ radiation?
1 Mass number decreases by four and atomic number decreases by two.
2 Mass number and atomic number remain unchanged.
3 Mass number remains unchanged, while atomic number decreases by one.
4 Mass number increases by four and atomic number increases by two.
Explanation:
B There will be no change in the mass number and atomic number of the nucleus. This is because gamma radiation are electromagnetic radiation and hence, do not have any mass or charge.
C According to the question, hydrogen is converted into helium and two positron and energy. This reaction corresponding fusion.
TS EAMCET 28.09.2020
NUCLEAR PHYSICS
147579
In which process neutron is converted into proton?
1 $\alpha$-decay
2 $\beta^{+}$decay
3 $\beta^{-}$decay
4 $\gamma$ decay
Explanation:
C In $\beta^{-}$decay a neutron is converted to a proton due to change in the nucleus, a beta particle is emitted.
GUJCET 2020
NUCLEAR PHYSICS
147582
A radioactive sample has an activity $A$ in air. If the sample is kept inside water, then its activity A'.
1 Becomes less than $\mathrm{A}$
2 Becomes more than $\mathrm{A}$
3 Is same as A
4 Will be less than or equal to A depending on the density of water
Explanation:
C Activity of a radioactive sample does not depend on the type of medium in which it is kept: If the radioactive sample is kept inside water then its activity (A) remains same as in air.
147572
What happens to the mass number and atomic number of an element when it emits $\gamma$ radiation?
1 Mass number decreases by four and atomic number decreases by two.
2 Mass number and atomic number remain unchanged.
3 Mass number remains unchanged, while atomic number decreases by one.
4 Mass number increases by four and atomic number increases by two.
Explanation:
B There will be no change in the mass number and atomic number of the nucleus. This is because gamma radiation are electromagnetic radiation and hence, do not have any mass or charge.
C According to the question, hydrogen is converted into helium and two positron and energy. This reaction corresponding fusion.
TS EAMCET 28.09.2020
NUCLEAR PHYSICS
147579
In which process neutron is converted into proton?
1 $\alpha$-decay
2 $\beta^{+}$decay
3 $\beta^{-}$decay
4 $\gamma$ decay
Explanation:
C In $\beta^{-}$decay a neutron is converted to a proton due to change in the nucleus, a beta particle is emitted.
GUJCET 2020
NUCLEAR PHYSICS
147582
A radioactive sample has an activity $A$ in air. If the sample is kept inside water, then its activity A'.
1 Becomes less than $\mathrm{A}$
2 Becomes more than $\mathrm{A}$
3 Is same as A
4 Will be less than or equal to A depending on the density of water
Explanation:
C Activity of a radioactive sample does not depend on the type of medium in which it is kept: If the radioactive sample is kept inside water then its activity (A) remains same as in air.
147572
What happens to the mass number and atomic number of an element when it emits $\gamma$ radiation?
1 Mass number decreases by four and atomic number decreases by two.
2 Mass number and atomic number remain unchanged.
3 Mass number remains unchanged, while atomic number decreases by one.
4 Mass number increases by four and atomic number increases by two.
Explanation:
B There will be no change in the mass number and atomic number of the nucleus. This is because gamma radiation are electromagnetic radiation and hence, do not have any mass or charge.
C According to the question, hydrogen is converted into helium and two positron and energy. This reaction corresponding fusion.
TS EAMCET 28.09.2020
NUCLEAR PHYSICS
147579
In which process neutron is converted into proton?
1 $\alpha$-decay
2 $\beta^{+}$decay
3 $\beta^{-}$decay
4 $\gamma$ decay
Explanation:
C In $\beta^{-}$decay a neutron is converted to a proton due to change in the nucleus, a beta particle is emitted.
GUJCET 2020
NUCLEAR PHYSICS
147582
A radioactive sample has an activity $A$ in air. If the sample is kept inside water, then its activity A'.
1 Becomes less than $\mathrm{A}$
2 Becomes more than $\mathrm{A}$
3 Is same as A
4 Will be less than or equal to A depending on the density of water
Explanation:
C Activity of a radioactive sample does not depend on the type of medium in which it is kept: If the radioactive sample is kept inside water then its activity (A) remains same as in air.
147572
What happens to the mass number and atomic number of an element when it emits $\gamma$ radiation?
1 Mass number decreases by four and atomic number decreases by two.
2 Mass number and atomic number remain unchanged.
3 Mass number remains unchanged, while atomic number decreases by one.
4 Mass number increases by four and atomic number increases by two.
Explanation:
B There will be no change in the mass number and atomic number of the nucleus. This is because gamma radiation are electromagnetic radiation and hence, do not have any mass or charge.
C According to the question, hydrogen is converted into helium and two positron and energy. This reaction corresponding fusion.
TS EAMCET 28.09.2020
NUCLEAR PHYSICS
147579
In which process neutron is converted into proton?
1 $\alpha$-decay
2 $\beta^{+}$decay
3 $\beta^{-}$decay
4 $\gamma$ decay
Explanation:
C In $\beta^{-}$decay a neutron is converted to a proton due to change in the nucleus, a beta particle is emitted.
GUJCET 2020
NUCLEAR PHYSICS
147582
A radioactive sample has an activity $A$ in air. If the sample is kept inside water, then its activity A'.
1 Becomes less than $\mathrm{A}$
2 Becomes more than $\mathrm{A}$
3 Is same as A
4 Will be less than or equal to A depending on the density of water
Explanation:
C Activity of a radioactive sample does not depend on the type of medium in which it is kept: If the radioactive sample is kept inside water then its activity (A) remains same as in air.
