Ais calculated as a flat percentage of income earned, regardless of level of income.
(a) progressive tax
(b) regressive tax
(c) proportional tax
(d) estate and gift tax

C

Explanation:

A proportional tax is an income tax system where the same percentage of tax is levied on all taxpayers, regardless of their income. A proportional tax applies the same tax rate across low, middle, and high-income taxpayers.

In contrast, the progressive tax system adjusts tax rates by incomes. A marginal rate taxing system, such as the flat tax, has a constant rate for both businesses and individual taxpayer . In some instances, a sales tax can also be considered a type of proportional tax since all consumers, regardless of earnings, are required to pay the same fixed rate. The sales tax rate applies to goods and services, and the income of the purchaser is not a part of the equation. Other examples include poll taxes and the capped portion of the Federal Insurance Contributions Act (FICA) payroll deductions.

In a proportional tax system, all taxpayers are required to pay the same percentage of their income in taxes. For example, if the rate is set at 20%, a taxpayer earning $10,000 pays $2,000 and a taxpayer earning $50,000 pays $10,000. Similarly, a person earning $1 million would pay $200,000.

(C) proportional tax

Explanation:

A proportional tax is that tax system whose tax rate is always the same, regardless of the tax base, the same tax rate will always apply. It is the opposite of progressive tax.

These types of taxes do not establish differences depending on the level of income of people. Unlike the progressive taxes, the same percentage will always be applied to the tax base. Unlike progressive taxes, proportional taxes do not fulfill a redistribution of income function.

sound is invisible, but sometimes we can feel it. when a kettle-drum is thumped with a stick that time the tight drum skin moving up and down very quickly for some time and then it pumped sound waves into the air. loudspeakers also work in a similar manner.

components of a speaker:

electromagnet

in order to translate an electrical signal into an audible sound, an electromagnet is used in looudspeakers

  suspension

suspension is used to   center the voice coil in the gap of the magnet and it exerts a restoring force to keep it there. suspension is used to limits the maximum mechanical excursion of the diaphragm and voice coil.

voice coil

voice coil is a coil of wire which is attached to the apex of a loudspeaker cone. it provides the motive force to the cone by the reaction of a magnetic field to the current passing through it.

cone

in a   loudspeaker, a   thin, semi-rigid membrane attached to the voice coil, which moves in a magnetic gap due to which it vibrates   and produced sound. it is known as diaphragm and it can also be called a cone, though not all speaker diaphragms are cone-shaped.

surround

surround is also known as front suspension. surround is used to join the cone to the chassis. together with the suspension it controls the cone excursion, and it is also used to   determine how energy which is   travelling through the cone is absorbed, and how the speaker limits when it reaches the ends of its travel.

dustcap

dustcap is used to protect the voice coil from dust and dirt. it is a part of the cone.

how speaker work

the outer part of the cone is fastened to the outer part of the loudspeaker's circular metal rim. the inner part is fixed to   voice coil that sits just in front of a permanent magnet . when loudspeaker is hooked up to a stereo, electrical signals feed through the speaker cables into the coil. it will convert the coil into an electromagnet magnet . when electricity flows back and forth in the cables, the electromagnet either repels or attract the permanent magnet. this moves the coil back and forth, and it pull and push the loudspeaker cone. like a drum skin vibrating back and forth, the moving cone pumps sounds out into the air.in this way loudspeakers works.