b. A transformer is used to increase the voltage to 2.75 x 105V before it is fed into transmission lines. The primary coil of the transformer has 2000 turns. i. State whether this is a step-up transformer or a step-down transformer. ii. Calculate the number of turns in the secondary coil of the transformer. iii. State why a high voltage is used in transmission lines when electricity is transmitted over very long distances between cities. arks)
b. A transformer is used to increase the voltage to 2.75 x 105V before it is fed into transmission lines. The primary coil of the transformer has 2000 turns. i. State whether this is a step-up transformer or a step-down transformer. ii. Calculate the number of turns in the secondary coil of the transformer. iii. State why a high voltage is used in transmission lines when electricity is transmitted over very long distances between cities. arks)
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This is the follow up question please answer bi, bii and biii NOT a
![sides are 35.0cm and the shorter sides are 14.0cm. The coil is held between the poles of a large magnet
A rectangular coil in the generator in an electricity power station contains 7250 turns of wire. The longer
so that it can rotate about an axis through its centre. The magnet produces a uniform magnetic field of
strength 12.67T between its poles.
pole-piece
of magnet
N
V
35.0cm
14.0cm
-axis of rotation
S
[Diagram not to scale. Note that not all of the 7250 loops of wire are shown in this diagram.]
a. The coil is initially positioned horizontally and is then turned through an angle of 90° in a time of
0.180s.
i. State the magnitude of the flux through the coil when it is positioned horizontally as
shown in the diagram.
ii. Show that the flux through the coil when it has rotated through an angle of 90° is
0.621Wb.
oste si gon
iii. Hence, show that the magnitude of the average emf induced in the coil is 2.50 x 10¹V.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2a197753-fa8d-4a8d-bc85-decdcbd9991a%2Fb02bbac4-a407-40ad-87ff-a226c4045b01%2Fotnen2l_processed.jpeg&w=3840&q=75)
Transcribed Image Text:sides are 35.0cm and the shorter sides are 14.0cm. The coil is held between the poles of a large magnet
A rectangular coil in the generator in an electricity power station contains 7250 turns of wire. The longer
so that it can rotate about an axis through its centre. The magnet produces a uniform magnetic field of
strength 12.67T between its poles.
pole-piece
of magnet
N
V
35.0cm
14.0cm
-axis of rotation
S
[Diagram not to scale. Note that not all of the 7250 loops of wire are shown in this diagram.]
a. The coil is initially positioned horizontally and is then turned through an angle of 90° in a time of
0.180s.
i. State the magnitude of the flux through the coil when it is positioned horizontally as
shown in the diagram.
ii. Show that the flux through the coil when it has rotated through an angle of 90° is
0.621Wb.
oste si gon
iii. Hence, show that the magnitude of the average emf induced in the coil is 2.50 x 10¹V.
Transcribed Image Text:b. A transformer is used to increase the voltage to 2.75 x 105V before it is fed into transmission
lines. The primary coil of the transformer has 2000 turns.
i. State whether this is a step-up transformer or a step-down transformer.
ii. Calculate the number of turns in the secondary coil of the transformer.
iii. State why a high voltage is used in transmission lines when electricity
transmitted over very long distances between cities.
8. The diagram below shows two parallel metal plates with a potential difference applied between them. In
the region between these plates there is a magnetic field directed into the page.
A charged particle, carrying a charge q, is injected into the space between the plates with velocity v at right
angles to the electric field. The particle moves with constant velocity between the plates.
O
9
V
X
X
Xx
X
XXX
X X
X
X
X
X
X
+
X X
X
X
X
X
X
X
X
arks)
X
Explain why it is possible for the charged particle to travel in a straight between the two plates, even
though it is subjected to the influence of forces due to the electric and magnetic fields.
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