2. a. as you push a conductive loop into a magnetic field, energy is produced (as current flows through a resistor). where does this energy come from? b. a sheet of aluminum, with its normal oriented due west, falls vertically toward the earth’s surface. as it falls, it encounters a uniform magnetic field that is directed due west. (i) viewed from the east (i. e. looking west), what direction do the eddy currents flow in the sheet as it enters the field? (ii) viewed from the east (i. e. looking west), what direction do the eddy currents flow in the sheet as it leaves the field? (iii)the current dissipates electrical energy. in what form is that energy before the sheet has entered the field? (iv) in what form is that energy after the current has ceased to flow?

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.

inverse v=i*r

nice nice

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