Study the scenario.

A magnetic field is generated when using an electromagnet. The events that occur to create the magnetic field are listed below.

The magnetic domains align inside the piece of metal.

Close the circuit so a current flows through it.

Wrap a wire to create loops around a piece of metal, such as iron.

The magnetic field is generated inside the loops.

What is the correct order of events?

1. C, A, B, D

2. A, C, B, D

3. B, A, D, C

4. C, B, D, A

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.

e

explanation:

there is no change in the electric potential energy as it is in rest on both conditions.

im sorry i dont know