Uploaded by Elbek Umarov

markScheme (3)

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- Mark Scheme
Question
1
2
Answer
D - slip rings and brushes
A - The needle moves briefly in
one direction and then returns
to the centre.
Marks
1
1
3(a)(i)
nothing / zero / 0
B1
3(a)(ii)
V = IR or V / R in words,
symbols or numbers
C1
6/10
C1
0.6
C1
0.6A OR amp(s) OR
ampere(s)
A1
candidate’s (a)(ii)
B1
(milli)ammeter OR galvanometer
NOT ampmeter
B1
nothing / stays the same /
half-way
B1
3(a)(iii)
4(a)
4(b)(i)
AO Element
/
Notes
Guidance
- Mark Scheme
Question
Answer
Marks
4(b)(ii)
nothing / stays the same /
half-way
B1
4(b)(iii)
nothing / stays the same /
half-way
B1
4(b)(iv)
it / arrow / pointer moves / goes
/ flicks OR current changes
M1
left and right OR backwards and
forwards
A1
4(c)
generator OR dynamo OR
microphone
B1
5(a)
SN
B1
5(b)
attractive / attract
B1
5(c)
attractive / attract
B1
6(a)
iron
B1
6(b)
V 1 / V 2 = N 1 / N 2 in words,
symbols or numbers
C1
correct substitution
C1
12 (V)
A1
AO Element
/
Notes
Guidance
- Mark Scheme
Question
Answer
Marks
AO Element
/
Notes
Guidance
7
top box ticked, increase or
decrease a.c.
B1
8
core
B1
9(a)
ammeter
B1
9(b)
2nd box ticked, current
B1
10(a)
resistor shown joining top two
wires or bottom two wires M1
M1
accept diagonal
connection
complete series circuit
A1
note: 2 resistors in
series gains only one
mark
10(b)
1.5 ( )
B1
11(a)
voltmeter
B1
11(b)
ammeter
B1
11(c)
correct symbol for ammeter
B1
NOT ampmeter
accept multimeter on
current range
NOT ampmeter
- Mark Scheme
Question
Answer
Marks
ammeter in series with lamp and
voltmeter across cell
condone voltmeter connected in
parallel
B1
lamp will blow / burn out
B1
accept blow up / glow
too / very brightly
ignore bright / won’t
work
13(a)
transformer shown with one coil
across input and other coil
across output
B1
accept any reasonable
attempt at transformer
symbol
13(b)
factor of 2 e.g. 12 / 6, 6 / 12 or 2:1
C1
ignore units
1:2 OR 1 to 2
A1
idea of points to north (pole of
Earth)
M1
OR repels
when freely suspended / floating
on water
A1
a (known) N pole
glows less brightly / dimmer
OR stops glowing
B1
12
14
15
AO Element
/
Notes
Guidance
- Mark Scheme
Question
16
17
Answer
A - OP only
any two from:
Marks
AO Element
/
Notes
Guidance
1
B2
friction/rubbing (between
clothing and seat)
lady becomes charged
discharged when touches
handle
18(a)
accept charge travels
through/to/from lady
(from/to handle) /
charge is earthed
V 1 / V 2 = N 1 / N 2 in any
form
C1
correct substitution
C1
80 (V)
A1
18(b)(i)
zero OR 0 (V)
M1
18(b)(ii)
idea of requirement of varying
field / flux linkage
A1
19
C - pushing the magnet into the
coil
1
- Mark Scheme
Question
20
Answer
Marks
iron clearly indicated
B1
steel clearly indicated
B1
damp
B1
22(a)
electromagnet
B1
22(b)
(magnetic field/magnetism) can
be controlled / can be switched
off
B1
(Place inside) coil
OR hammer it
OR heat it
B1
coil connected to a.c. (supply)
OR hammer for long time
OR heat to high temperature
then cool
B1
21
23
24
25
C - a generator
D - Only the steel remains
magnetised.
1
1
AO Element
/
Notes
Guidance
- Mark Scheme
Question
26
27
Answer
D - towards the top of the
diagram
B - moving both the magnet and
the coil to the left at the same
speed
28
steel
29
C
30
31
C - It reverses the direction of
the current in the coil after every
180° rotation of the coil.
turns faster OR
greater moment / turning effect
Marks
AO Element
/
Notes
Guidance
1
1
B1
1
1
1
[Total: 64]
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