Questions
Q1.
Answer the question with a cross in the box you think is correct
. If you change your mind
about an answer, put a line through the box
and then mark your new answer with a cross
.
Which of the following units is equivalent to the volt?
A
B
C
D
J s–1
W s–1
J C–1
W C–1
(Total for question = 1 mark)
(Q01 WPH12/01, Jan 2022)
Q2.
Answer the question with a cross in the box you think is correct
. If you change your mind
about an answer, put a line through the box
and then mark your new answer with a cross
.
Which of the following units is equivalent to the volt?
A
B
C
D
C s–1
J s–1
J C–1
Js
(Total for question = 1 mark)
(Q10 WPH12/01, Oct 2022)
Q3.
Answer the question with a cross in the box you think is correct
. If you change your mind
about an answer, put a line through the box
and then mark your new answer with a cross
A lamp is connected in the circuit as shown. The cell has negligible internal resistance.
.
In 30 seconds, the charge passing point P is 0.4 C.
Which of the following gives the energy, in joules, transferred by the cell during this time?
(Total for question = 1 mark)
(Q09 WPH12/01, Jan 2023)
Q4.
Answer the question with a cross in the box you think is correct ( ). If you change your mind, put
a line through the box ( ) and then mark your new answer with a cross ( ).
At a point in a circuit there is a current of 3.0 A.
Which of the following gives the total charge passing this point in 2.0 minutes?
A
0.025 C
B
1.5 C
C
6.0 C
D
360 C
(Total for question = 1 mark)
(Q06 WPH12/01, June 2022)
Q5.
In a series circuit, 3.1 × 1019 electrons pass a particular point in a time of 30 seconds.
Which of the following gives the magnitude of the current in amperes in this circuit?
(Total for question = 1 mark)
(Q10 WPH12/01, Jan 2021)
Q6.
Answer the question with a cross in the box you think is correct
. If you change your mind
about an answer, put a line through the box
and then mark your new answer with a cross
.
The definitions for current and potential difference both include
A
B
C
D
charge.
resistance.
time.
work done.
(Total for question = 1 mark)
(Q09 WPH12/01, June 2019)
Q7.
Answer the question with a cross in the box you think is correct
. If you change your mind
about an answer, put a line through the box
and then mark your new answer with a cross
The current at a point in a circuit is 1.25 A.
Which of the following expressions gives the number of electrons passing the point in 45 seconds?
.
(Total for question = 1 mark)
(Q07 WPH12/01, Oct 2022)
Q8.
Part of an electrical circuit is shown.
In 60 seconds, 4.80 × 1020 electrons pass point Z.
(a) Show that the current at Z is about 1.3 A.
(3)
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(b) In 60 seconds, the resistor transfers 24 J of energy.
Calculate the potential difference across the resistor.
(2)
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.............................................................................................................................................
.............................................................................................................................................
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Potential difference = ...........................................................
(Total for question = 5 marks)
(Q11 WPH12/01, June 2023)
Q9.
The photograph shows an electric skateboard.
One particular type of electric skateboard uses an electric motor connected to a 22 V rechargeable
lithium-ion battery. A fully-charged battery is able to pass 36,000 C of charge through the circuit and will
allow continuous operation of the skateboard for 40 minutes.
(a) Calculate the total energy stored in a fully-charged lithium-ion battery.
(2)
.............................................................................................................................................
.............................................................................................................................................
.............................................................................................................................................
.............................................................................................................................................
Total energy stored = ...........................................................
(b) The electric skateboard travels at a speed of 16 kilometres per hour.
(i) Calculate the time taken for the electric skateboard to travel 2.0 m.
(2)
.............................................................................................................................................
.............................................................................................................................................
.............................................................................................................................................
.............................................................................................................................................
Time taken = ...........................................................
(ii) While the electric skateboard is in use, the battery provides a constant current.
Calculate the number of electrons that flow past a point in the circuit during the time taken for the
electric skateboard to travel 2.0 m.
(3)
.............................................................................................................................................
.............................................................................................................................................
.............................................................................................................................................
.............................................................................................................................................
.............................................................................................................................................
.............................................................................................................................................
Number of electrons = ...........................................................
(Total for question = 7 marks)
(Q13 WPH12/01, Oct 2019)
Q1.
No Examiner's Report available for this question
Q2.
This question was one of the best answered, with at least 75% of the students getting the correct answer.
(Q10 WPH12/01, Oct 2022)
Q3.
No Examiner's Report available for this question
Q4.
This was by far the best answered question (a simple Q = It calculation).
(Q06 WPH12/01, June 2022)
Q5.
No Examiner's Report available for this question
Q6.
No Examiner's Report available for this question
Q7.
No Examiner's Report available for this question
Q8.
This is a two-part question, both calculations, where the answer for part (a) might be needed for part (b).
Hence part (a) is a "show that" question, where you are given the expected answer so that it can be used
for part (b) if the candidate has not been able to correctly answer part (a).
For "show that" questions, there are two golden rules:
1) Show the answer to at least one more significant figure than the value given (in the case of this
question, that means 1.28A instead of 1.3A)
2) Always show all of the numbers used in calculations, so it is clear that you have used the correct
method to achieve the answer.
Generally speaking, both parts of this question were answered very well, with more than 80% of
candidates achieving full marks on (a), and more than 65% of candidates achieving full marks on (b).
Results Plus: Examiner Comments
(a) This candidate appears to have completed a backwards calculation in order to find the total
charge required in order to result in a current of 1.3A. The first thing to notice is that the answer
is not given to anymore significant figures than the "show that" value given, so they do not score
MP3. We also do not see any calculation to calculate the total charge (using the number of
electrons given in the question). So it also does not score MP1. However, they have used the
equation to calculate current from charge and time, so score MP2.
(b) Having established that the total charge is 78 C from part (a), this candidate then correctly
substitutes into the equation to calculate potential difference. If this had been represented as a
decimal and with units on the end, it would have scored both marks, but leaving the answer as a
fraction does not allow MP2 to be awarded, even if the units had been there.
Results Plus: Examiner Tip
In physics examinations, answers should not be left as fractions, surds, recurring
decimals or in factors of pi.
Results Plus: Examiner Comments
(a) This candidate has a fully-correct all in one calculation to achieve the correct
answer of 1.28A. The comparison with 1.3A is not necessary, but it always considered
good practice.
(b) The candidate has incorrectly quoted and rearranged the equation to find potential
difference. Although the numbers they insert are the correct numbers for the symbols
they have used, the equation is incorrect so it does not gain any credit here.
Results Plus: Examiner Comments
(a) This candidate has done two separate calculations to achieve a fully-correct answer
for all 3 marks. The calculation for charge is nice and clear, showing both a numerical
value and units of coulombs. It is worth noting that if the units had been incorrectly
quoted (e.g. farads), we would not penalise this as it is an interim stage in the
calculation.
(b) A correct calculation for potential difference with units, scoring full marks on this
part too.
(Q11 WPH12/01, June 2023)
Q9.
No Examiner's Report available for this question
Mark Scheme
Q1.
(Q01 WPH12/01, Jan 2022)
Q2.
(Q10 WPH12/01, Oct 2022)
Q3.
(Q09 WPH12/01, Jan 2023)
Q4.
(Q06 WPH12/01, June 2022)
Q5.
(Q10 WPH12/01, Jan 2021)
Q6.
(Q09 WPH12/01, June 2019)
Q7.
(Q07 WPH12/01, Oct 2022)
Q8.
(Q11 WPH12/01, June 2023)
Q9.
(Q13 WPH12/01, Oct 2019)