Summer 2026 Predicted
worked solutions
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,1. A student repeats a length measurement five times: 42, 45, 43, 44, 41 mm.
What is the uncertainty in the mean value?
A 0.5 mm
B 1.0 mm
C 2.0 mm
D 4.0 mm
(Total for Question 1 = 1 mark)
2. Which correctly expresses the Young modulus in SI base units?
A N m⁻²
B kg m⁻¹ s⁻²
C kg m s⁻²
D N m⁻¹
(Total for Question 2 = 1 mark)
3. Light of frequency 8.0 × 10¹⁴ Hz strikes a metal with work function 2.5 eV. What is the
maximum kinetic energy of emitted photoelectrons? (h = 6.63 × 10⁻³⁴ J s; 1 eV = 1.6 ×
10⁻¹⁹ J)
A 5.30 × 10⁻¹⁹ J
B 1.30 × 10⁻¹⁹ J
C 1.30 × 10⁻²⁰ J
D 1.70 × 10⁻¹⁹ J
(Total for Question 3 = 1 mark)
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,4. A satellite orbits at radius r with period T. The radius is doubled to 2r. What is the new
period?
A 2T
B 2√2 T
C 4T
D 8T
(Total for Question 4 = 1 mark)
5. A gas is heated so its absolute temperature doubles. What happens to the mean
square speed of the molecules?
A It halves
B It doubles
C It quadruples
D It is unchanged
(Total for Question 5 = 1 mark)
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, 6. A radioactive isotope has decay constant λ = 0.023 s⁻¹. What is its half-life?
A 15 s
B 30 s
C 43 s
D 0.016 s
(Total for Question 6 = 1 mark)
7. Two progressive waves of equal amplitude and frequency travel in opposite directions
along a string. What is formed?
A A transverse progressive wave
B A longitudinal wave
C A stationary wave
D A diffracted wave
(Total for Question 7 = 1 mark)
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worked solutions
for more: tyrionpapers.com
,1. A student repeats a length measurement five times: 42, 45, 43, 44, 41 mm.
What is the uncertainty in the mean value?
A 0.5 mm
B 1.0 mm
C 2.0 mm
D 4.0 mm
(Total for Question 1 = 1 mark)
2. Which correctly expresses the Young modulus in SI base units?
A N m⁻²
B kg m⁻¹ s⁻²
C kg m s⁻²
D N m⁻¹
(Total for Question 2 = 1 mark)
3. Light of frequency 8.0 × 10¹⁴ Hz strikes a metal with work function 2.5 eV. What is the
maximum kinetic energy of emitted photoelectrons? (h = 6.63 × 10⁻³⁴ J s; 1 eV = 1.6 ×
10⁻¹⁹ J)
A 5.30 × 10⁻¹⁹ J
B 1.30 × 10⁻¹⁹ J
C 1.30 × 10⁻²⁰ J
D 1.70 × 10⁻¹⁹ J
(Total for Question 3 = 1 mark)
for more: tyrionpapers.com
,4. A satellite orbits at radius r with period T. The radius is doubled to 2r. What is the new
period?
A 2T
B 2√2 T
C 4T
D 8T
(Total for Question 4 = 1 mark)
5. A gas is heated so its absolute temperature doubles. What happens to the mean
square speed of the molecules?
A It halves
B It doubles
C It quadruples
D It is unchanged
(Total for Question 5 = 1 mark)
for more: tyrionpapers.com
, 6. A radioactive isotope has decay constant λ = 0.023 s⁻¹. What is its half-life?
A 15 s
B 30 s
C 43 s
D 0.016 s
(Total for Question 6 = 1 mark)
7. Two progressive waves of equal amplitude and frequency travel in opposite directions
along a string. What is formed?
A A transverse progressive wave
B A longitudinal wave
C A stationary wave
D A diffracted wave
(Total for Question 7 = 1 mark)
for more: tyrionpapers.com
