A point charge is positioned in the center of a hollow metallic shell of radius R During four experiments the value of the point charge and the total charge on shell were respectively 1) 5q; 0
2) 6q; +2q
3) 2q; -3q
4) 4q; +12q
1. Rank the experiments according to the charge on the inner surface of the shell, largest (most positive) to smallest.
Grade Summary
Deductions 0%
Potential 100%
The charge on the inner surface will stay 0 in each experiment:
1-3-4-2
2-4-3-1
2-3-1-4
1-2-3-4
2) Rank the experiments according to magnitude of the electric field at a distance R2 from the center of the shell largest to smallest.
3) Rank the experiments according to the magnitude of the electric field at a distance 3R from a center of the shell, largest to smallest.

answer: the correct answer is 1.

explanation: there are various process in which a radioactive nuclei decays:

1) alpha decay: in this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. the mass number is reduced by 4 units.

2) electron capture: in this decay process, a parent nuclei absorbs an electron and gets converted into a neutron. simply, a proton and an electron combines together to form a neutron. mass number does not change in this process.

3) gamma ray emission: it is a decay process in which an unstable nuclei gives excess energy by a spontaneous electromagnetic process. this decay releases . this process does not change the mass number.

4) positron emission: it is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. this is also known as -decay. in this the mass number remains same.

from the above information, we see that only alpha-decay is producing a change in the mass number of the nucleus.

the answer is b

explanation:

i think its c if i'm wrong

conservation of mass

mass before something happens = mass afterwards