IBDP Online Test Series By iitianacademy
Comprehensive Test Preparatory package targeted towards IBDP
Question
The dimensions of a cube are measured with vernier calipers. The measured length of each side is 30.0 mm. If the vernier callipers can be read with an uncertainty of +/- 0.1 mm. What is the approximate percentage uncertainty in the value of the volume?
A 4%
B 3%
C 0.3%
D 1%
Question
What is the best estimate for the diameter of a helium nucleus?
A. 10–21 m
B. 10–18 m
C. 10–15 m
D. 10–10 m
Answer/Explanation
Markscheme
C
Question
How many significant figures are there in the number 0.0450?
A. 2
B. 3
C. 4
D. 5
Answer/Explanation
Markscheme
B
Question
Light of wavelength 400nm is incident on two slits separated by 1000µm. The interference pattern from the slits is observed from a satellite orbiting 0.4Mm above the Earth. The distance between interference maxima as detected at the satellite is
A. 0.16Mm.
B. 0.16km.
C. 0.16m.
D. 0.16mm.
Answer/Explanation
Markscheme
B
Question
A swimming pool contains 18×106 kg of pure water. The molar mass of water is 18gmol–1. What is the correct estimate of the number of water molecules in the swimming pool?
A. 104
B. 1024
C. 1025
D. 1033
Answer/Explanation
Markscheme
D
Question
Which of the following expresses the watt in terms of fundamental units?
A. kg m2 s
B. kg m2 s-1
C. kg m2 s-2
D. kg m2 s-3
Answer/Explanation
Markscheme
D
Question
The force of air resistance F that acts on a car moving at speed v is given by F=kv2 where k is a constant. What is the unit of k?
A. kg m–1
B. kg m–2s2
C. kg m–2
D. kg m–2s–2
Answer/Explanation
Markscheme
A
Question
Which of the following is a unit of energy?
A. kg m–1 s–1
B. kg m2 s–2
C. kg m s–2
D. kg m2 s–1
Answer/Explanation
Markscheme
B