Download control unit 6

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SESSION 5 (UNIT 6)
1- The system consists ….. a high voltage and a low voltage circuit
a)of b)in
c)on
d)by
2- Electromagnetism is the basis … most electrical devices work a)by which b)in which c)on which
3- An electric current …… by placing an iron bar in a coil
a) strengthens b) is strongen c) makes stronger d) is strengthened
4- We can measure the intensity of the electric current …………an ammeter a) for
5- … metals, iron is the most commonly used
a) Among
7- The discovery of electromagnetism … the development of electric motors
8- Generators can produce … 1.5 million volts a) as much energy as
c) Inside
b) creates and emf
a)let to
d) along
d)With
c)an emf is created
b)leaded to
b)much energy than c)as energy as
d)creating an emf
c) was allowed
d) led to
d)more energy that
a)wind b)wound c)winded d)wounded
10- Electromagnetism is the force which holds electrons together……..atoms
1112131415-
b) along c) by means of
b) Between
6- If we cut the lines of force of a magnetic field …….a)it is created an emf
9- In the rotor the coil is ………around the armature
d)which
a)inside
b)inside of
A leaky faucet can be repaired …….. a hammer
a)by
b)with
Concentrate on your exercise….. make any mistakes
a)for not to b)to do not c) so as not to d)for don’t
....... working hard, he didn’t get the job
a) Although
b)Besides
c) In spite of
d) Despite of
Mechanical energy can …… electrical energy a)be converted into
b) be transformed in c)occur like d)allow
Interactions between nearby galaxies may ultimately … a galaxy merger
a) result b)become into
c)result in
d)become in
CORRECT THE MISTAKES: The nucleus is about one ten-thousandth as large than the atom despite it contains the most of the
mass
TRANSLATION
………………………………………………………………………………….. (Para generar electricidad)……………………………………………………. (es
necesario) for electrons to move. …………………………………..……………………… (Uno de los metodos mas usados) is by chemical reactions. An
example of this is ……………………………………………...………. (lo que se conoce como pila). At present, many devices and appliances make use
of these batteries, ……………... ………………………………………………………… (como las que se usan en los coches). Let’s see
……………………………………………. (como funciona el sistema). The two plates of the cell are called electrodes and are placed in a solution. Each
electrode reacts differently with the electrolyte, ……………………………………….…………………………………… (lo que hace que se cree una
diferencia de potencial). This fact ……………………………………………………….…………………….. (permite que los electrones fluyan de un
electrodo al otro), thus generating an electric current. ………………………..……………………………. (A diferencia de la electrolisis),
electromagnetism can create an electric current ……………………………….………….. (cortando) the lines of force of a magnet.
VIDEO QUESTIONS : MAGNETIC FIELDS (SC6) BOOK p 77-78
1-
Why do the magnets attract when the N pole of a magnet is facing the S pole of the other magnet? (USE YOUR OWN WORDS)
2-
Why do the magnets repel when like poles face each other? (USE YOUR OWN WORDS)
3-
What happens when we place pieces of iron along one side of the magnets? Why?
45-
Practical applications mentioned in the video
Find 4 different expressions (WITH A PREPOSITION) used in the video to describe position of the magnets and/or the lines of force
VIDEO: HOW ELECTROMAGNETS WORK : http://www.youtube.com/watch?v=EjfEiEwpuT8
1.
2.
3.
4.
What is a magnet?
How does an electromagnet compare to a permanent magnet?
How strong is the current in the second example?
Which is the advantage of an electromagnet?