Question

1).what are resistance of ideal voltmeter and Ammeter?
2). formula of the half life of nuclei?
3). Henry is unit of self inductance ( yes/ no) why.

Answer 1

1. the ideal ammeter has zero internal resistance.

2.A radioactive half-life refers to the amount of time it takes for half of the original isotope to decay.

3. Henry, unit of either self-inductance or mutual inductance, abbreviated h (or hy), and named for the American physicist Joseph Henry. One henry is the value of self-inductance in a closed circuit or coil in which one volt is produced by a variation of the inducing current of one ampere per second.