2
H556/02 EXPLORING PHYSICS A
LEVEL OCR JUNE 2018 QUESTION
PAPER WITH MARK SCHEME
REVISED AND REVIEWED 2025-2026
SECTION A
You should spend a maximum of 30 minutes on this section.
Write your answer to each question in the box provided.
Answer all the questions.
1 Which electrical quantity has S.I. units ampere-second (A s)?
A charge
B current
C resistance
D potential difference
Your answer [1]
2 Three resistors are connected in a circuit.
20.0
10.0 10.0
The resistance of each resistor is shown in the circuit diagram.
What is the total resistance of this circuit?
A 10.0 Ω
B 20.2 Ω
C 25.0 Ω
D 40.0 Ω
© OCR 2018
, 3
Your answer [1]
© OCR 2018 Turn over
, 4
3 An electron has a de Broglie wavelength equal to the wavelength of X-rays.
What is the best estimate of the momentum of this electron?
A 10−30 kg m s−1
B 10−27 kg m s−1
C 10−23 kg m s−1
D 10−18 kg m s−1
Your answer [1]
4 A vibrating tuning fork is held above the open end of a long vertical tube. The other end of the
tube, which is also open, is immersed in a tank of water. The length L of the air column within the
tube is changed by raising or lowering the tube.
vibrating tuning
fork
tube
L
air
water
The wavelength of sound from the vibrating tuning fork is 150.0 cm.
What length L of air column will not produce a stationary wave within the tube?
A 37.5 cm
B 75.0 cm
C 112.5 cm
D 187.5 cm
Your answer [1]
© OCR 2018
, 3
5 Three identical resistors X, Y and Z are connected to a power supply.
X Y
Z
+ –
power supply
The power dissipated in the resistor Z is 24 W.
What is the power dissipated in the resistor Y?
A 6.0 W
B 12 W
C 24 W
D 48 W
Your answer [1]
6 Which is the best value for the elementary charge e in terms of both accuracy and precision?
A (1.5 ± 0.5) # 10−19 C
B (1.5 ± 0.4) # 10−19 C
C (1.7 ± 0.2) # 10−19 C
D (1.8 ± 0.2) # 10−19 C
Your answer [1]
© OCR 2018 Turn over
H556/02 EXPLORING PHYSICS A
LEVEL OCR JUNE 2018 QUESTION
PAPER WITH MARK SCHEME
REVISED AND REVIEWED 2025-2026
SECTION A
You should spend a maximum of 30 minutes on this section.
Write your answer to each question in the box provided.
Answer all the questions.
1 Which electrical quantity has S.I. units ampere-second (A s)?
A charge
B current
C resistance
D potential difference
Your answer [1]
2 Three resistors are connected in a circuit.
20.0
10.0 10.0
The resistance of each resistor is shown in the circuit diagram.
What is the total resistance of this circuit?
A 10.0 Ω
B 20.2 Ω
C 25.0 Ω
D 40.0 Ω
© OCR 2018
, 3
Your answer [1]
© OCR 2018 Turn over
, 4
3 An electron has a de Broglie wavelength equal to the wavelength of X-rays.
What is the best estimate of the momentum of this electron?
A 10−30 kg m s−1
B 10−27 kg m s−1
C 10−23 kg m s−1
D 10−18 kg m s−1
Your answer [1]
4 A vibrating tuning fork is held above the open end of a long vertical tube. The other end of the
tube, which is also open, is immersed in a tank of water. The length L of the air column within the
tube is changed by raising or lowering the tube.
vibrating tuning
fork
tube
L
air
water
The wavelength of sound from the vibrating tuning fork is 150.0 cm.
What length L of air column will not produce a stationary wave within the tube?
A 37.5 cm
B 75.0 cm
C 112.5 cm
D 187.5 cm
Your answer [1]
© OCR 2018
, 3
5 Three identical resistors X, Y and Z are connected to a power supply.
X Y
Z
+ –
power supply
The power dissipated in the resistor Z is 24 W.
What is the power dissipated in the resistor Y?
A 6.0 W
B 12 W
C 24 W
D 48 W
Your answer [1]
6 Which is the best value for the elementary charge e in terms of both accuracy and precision?
A (1.5 ± 0.5) # 10−19 C
B (1.5 ± 0.4) # 10−19 C
C (1.7 ± 0.2) # 10−19 C
D (1.8 ± 0.2) # 10−19 C
Your answer [1]
© OCR 2018 Turn over
