Who Wants To Be A Millionaire?

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Who Wants To Be A Millionaire?
Electricity and Magnetism
2
Question 1
3
An ammeter is used for measuring

• A Electrical charge
• B Circuit temperature
• C Electrical current
• D Potential difference

4
Answer
A Electrical charge B Circuit temperature C
Electrical current D Potential difference
5
100
6
Question 2
7
Brushes on an electric motor connect to the

• A commutator
• B communitarianist
• C communist
• D commentator

8
Answer
A commutator B communitarianist C
communist D commentator
9
200
10
Question 3
11
Doubling the number of turns on a solenoid will

• A Increase the magnetic force
• B Increase the current
• C Decrease the magnetic force
• D Increase the voltage

12
Answer
A Increase the magnetic force B Increase the
current C Decrease the magnetic force D
Increase the voltage
13
300
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Question 4
15
I kWh of electrical energy costs 5p. What is the
cost of running a 10 kW oven for 5 hours?

• A 5
• B 25
• C 25p
• D 2.50

16
Answer
A 5 B 25 C 25p D 2.50
17
500
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Question 5
19
A copper wire carrying an electrical current

• A Has no magnetic field around it
• B Has a magnetic field around it
• C Only has a north pole
• D Only has a south pole

20
Answer
A Has no magnetic field around it B Has a
magnetic field around it C Only has a north
pole D Only has a south pole
21
1,000
22
Question 6
23
Which of the following is the correct rule for
electric motors?

• A Flemings right hand rule
• B The right hand grip
• C The left hand grip
• D Flemings left-hand rule

24
Answer
A Flemings right hand rule B The right hand
grip C The left hand grip D Flemings left-hand
rule
25
2,000
26
Question 7
27
The resistance value of two 10 O resistors in
parallel is

• A 0.5 O
• B 20 O
• C 5 O
• D 2 O

28
Answer
A 0.5 O B 20 O C 5 O D 2 O
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4,000
30
Question 8
31
The relationship between voltage and current in
Ohms law is

• A V I x R
• B R V x I
• C I V x R
• D V I/R

32
Answer
A V I x R B R V x I C I V x R D
V I/R
33
8,000
34
Question 9
35
Which one is wrong A current in a wire is
induced when

• A a wire is moved between the poles of a magnet
• B a coil is moved to and fro across a wire
• C a magnet is moved in and out of a coil
• D a wire moves faster and faster in a magnetic
  field

36
Answer
A a wire is moved between the poles of a
magnet B a magnet is moved in and out of a
coil C a coil is moved to and fro across a
wire D a wire moves faster and faster in a
magnetic field
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16,000
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Question 10
39
The value of the secondary voltage in a
transformer is calculated using

• A Vs x Vp Ns x Np
• B Vs / Np Ns / Vp
• C Vs / Vp Ns / Np
• D Vp x Ip Vs x Is

40
Answer
A Vs x Vp Ns x Np B Vs / Np Ns /
Vp C Vs / Vp Ns / Np D Vp x Ip Vs
x Is
41
32,000
42
Question 11
43
High voltage AC is used to transmit electrical
power because

• A Heat loss is inversely proportional to the
  current
• B Transformers heat up more with DC
• C Heat loss is proportional to the current
  squared
• D Low voltage produces more heat

44
Answer
A Heat loss is inversely proportional to the
current B Transformers heat up with DC C Heat
loss is proportional to the current D Low
voltage produces more heat
45
64,000
46
Question 12
47
A device that relies upon eddy currents is

• A A generator
• B A metal detector
• C A loudspeaker
• D A transformer

48
Answer
A A generator B A metal detector C A
loudspeaker D A transformer
49
125,000
50
Question 13
51
This AC generators electrical output shows that
the rotor was rotated how many times?

• A Once
• B Twice
• C Three times
• D Four times

52
Answer
A Once B Twice C Three times D Four
times
53
250,000
54
Question 14
55
Three-phase output from a power station
alternator results from

• A 3 Stator and rotor coil wire thicknesses used
• B 3 different speeds of rotation are sequenced
• C 6 stator coils and 6 rotor coils are set at 60o
  in the plane of rotation
• D 3 stator coils and 3 rotor coils are set at
  120o in the plane of rotation

56
Answer
A 3 Stator and rotor coil wire thicknesses are
used B 3 different speeds of rotation are
sequenced C 6 stator coils and 6 rotor coils are
set at 60o in the plane of rotation D 3 stator
coils and 3 rotor coils are set at 120o in the
plane of rotation
57
500,000
58
Question 15
59
To turn the heater ON the Temp sensor and Light
sensor must be

• A Temp 1, Light 1
• B Temp 0, Light 0
• C Temp 0, Light 1
• D Temp 1, Light 0

60
Answer
A Temp 1, Light 1 B Temp 0, Light 0 C Temp 0,
Light 1 D Temp 1, Light 0
61
1,000,000