When a bar magnet is thrust at the same speed into a coil having twice the number of loops, the induced voltage is the same, no different. half. twice as much. four times as much. none of the above

Twice as much

Explanation:

Changing magnetic flux through a coil produce emf in the coil.

According to Faraday's law induced voltage is given by

∈= - N *dФ \ dt ( 1 )

N is number of turns of coil

Ф is flux linkage

dФ/dt is rate of change of flux

From equation (1) it is clear if rate of change of flux is the same but we  doubled the number of loops (i.e N₂= 2N₁) the voltage induced will be double.

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 temperature and the pressure affect solubility. temperature affects by changing the properties of the solvent. the increase in pressure increases solubility, the decrease in pressure decreases solubility.