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Magnet Material or object that produces a magnetic field A magnet is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, and attracts or repels other magnets. A "horseshoe magnet" made of alnico, an iron alloy. The magnet, made in the shape of a horseshoe, has the two magnetic poles close together. This shape creates a strong magnetic field between the poles, allowing the magnet to pick up a heavy piece of iron. Magnetic field lines of a solenoid electromagnet, which are similar to a bar magnet as illustrated below with the iron filings A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. An everyday example is a refrigerator magnet used to hold notes on a refrigerator door. Materials that can be magnetized, which are also the ones that are strongl...

Definite article or Indefinite article, each of the articles has different uses in different situations. Using Indefinite Article: a & an Rule 1: A common noun in the singular number always requires an article before it. But a plural common noun does not require an article always. A plural common noun can have the article ‘the’ if we want to particularise that noun. Example: I saw a snake. (Refers to a random snake) I saw snakes in a zoo. (No article is required) I have seen the snake again. (Refers to the snake I have already seen earlier) I have seen the snakes again before leaving the zoo. (Refers to the particular snakes of the zoo which I saw earlier.) Rule 2: The choice between the two indefinite articles – a & an – is determined by sound. Words beginning with consonant sounds precede ‘a’ and words beginning with vowel sounds precede ‘an’. There are some special cases also. For instance, a university, a union, a useful book, etc. a one-dollar note, a one-man army, ...

Definite article or Indefinite article, each of the articles has different uses in different situations. Using Indefinite Article: a & an Rule 1: A common noun in the singular number always requires an article before it. But a plural common noun does not require an article always. A plural common noun can have the article ‘the’ if we want to particularise that noun. Example: I saw a snake. (Refers to a random snake) I saw snakes in a zoo. (No article is required) I have seen the snake again. (Refers to the snake I have already seen earlier) I have seen the snakes again before leaving the zoo. (Refers to the particular snakes of the zoo which I saw earlier.) Rule 2: The choice between the two indefinite articles – a & an – is determined by sound. Words beginning with consonant sounds precede ‘a’ and words beginning with vowel sounds precede ‘an’. There are some special cases also. For instance, a university, a union, a useful book, etc. a one-dollar note, a one-man army, ...

Share Via English Grammar . Download this app http://bit.ly/2IzMr8T Phrases Quiz 1. Phrases are grammatical units that consist of (one or more words / more than one word) 2. A noun phrase with more than one word can consist of a noun and words that (replace the noun / qualify the noun) 3. "The tour includes three Asian countries." Which is a noun phrase?(The tour includes / three Asian countries) 4. A verb phrase consists of a main verb and its (auxiliary verbs / phrasal verbs) 5. "She has been studying all day." Which is a verb phrase?(studying all day / has been studying) 6.An adjective phrase can be a single adjective or a group of words built around(an adjective / a single noun) 7. "Cats are playful pets, but dogs are very loyal as well." This sentence has(one adjective phrase / two adjective phrases) 8. Which sentence has an adverb phrase?(She sings very nicely. / She sings very nice songs.) 9. A prepositional phrase consists of a preposition...

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