An alternating current circuit has resistance r, inductance l and capacitance c in series with a voltage source. which statement is correct?
question options:
1) the voltage across the capacitor leads the voltage across the inductor by 90°.
2) the voltage across the inductor leads the voltage across the capacitor by 90°.
3) the voltage across the inductor leads the voltage across the resistor by 180°.
4) the voltage across the inductor leads the voltage across the capacitor by 180°.
5) both voltages lead the voltage across the resistor by 90°.

An  atom  (ours, not carroll's) consists of a positively charged  nucleus, surrounded by one or more negatively charged particles called  electrons. the positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. most of an atom's mass is in its nucleus; the mass of an electron is only 1/1836 the mass of the lightest nucleus, that of hydrogen. although the nucleus is heavy, it is quite small compared with the overall size of an atom. the radius of a typical atom is around 0.1 to 0.25 nanometres (nm), whereas the radius of a nucleus is about 10-6  nm.  *  if an atom were enlarged to the size of the earth, its nucleus would be only 200 feet in diameter and could easily rest inside a small football stadium.read more on -

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