IB Physics SL - 2024 - Questionbank

1.1 - Units, Significant Figures, and Measurement

Units, Significant Figures, Metric Multipliers

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Paper 1

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Question 1

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easy

Which of the following is not a fundamental SI unit?

A. $\hspace{1em}$ ampere
B. $\hspace{1em}$ kelvin
C. $\hspace{1em}$ newton
D. $\hspace{1em}$ mole

easy

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Question 2

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easy

Which of the following units is not a unit of power?

A. $\hspace{1em}$ W
B. $\hspace{1em}$ J
C. $\hspace{1em}$ N m s $^{-1}$
D. $\hspace{1em}$ J s $^{-1}$

easy

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Question 3

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easy

Which of the following is an estimate of the order of magnitude of the radius of the Earth?

A. $\hspace{1em}10^{7} \,m$
B. $\hspace{1em}10^{11}\, m$
C. $\hspace{1em}10^{15}\, m$
D. $\hspace{1em}10^{22} \,m$

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Question 4

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easy

A student models the relationship between velocity v of a moving charge in a magnetic field, and the force $F$ acting on it as $F = kv$ , with $k$ being a constant

What are the units for $k$ expressed in fundamental SI units?

A. $\hspace{1em}m \,s$
B. $\hspace{1em}kg \,s^{-1}$
C. $\hspace{1em}kg \,s^{-2}$
D. $\hspace{1em}m \,s^{-2}$

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Question 5

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easy

How many significant figures are there in 0.000017000?

A. $\hspace{1em}$ 2
B. $\hspace{1em}$ 5
C. $\hspace{1em}$ 6
D. $\hspace{1em}$ 9

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Question 6

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easy

Express 0.04758 to 3 significant figures.

A. $\hspace{1em}$ 0.04758
B. $\hspace{1em}$ 0.0476
C. $\hspace{1em}$ 0.048
D. $\hspace{1em}$ 0.05

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Question 7

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easy

Which of the following gives the unit for work in fundamental SI units?

A. $\hspace{1em} m^2\,s^2$
B. $\hspace{1em} kg\,m\,s^{-1}$
C. $\hspace{1em} kg\,m^2\,s^{-1}$
D. $\hspace{1em} kg\,m^2\,s^{-2}$

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Question 8

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easy

Which of the following is $\textbf{not}$ a unit for magnetic flux density?

A. $\hspace{1em}$ $T$
B. $\hspace{1em}$ $Wb\,m^2$
C. $\hspace{1em}$ $kg\,s^{-2}\,A^{-1}$
D. $\hspace{1em}$ $N\,A^{-1}\,m^{-1}$

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Question 9

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medium

Which of the following is equivalent to the unit of electric potential difference?

A. $\hspace{1em} N \,m \,C^{-1}$
B. $\hspace{1em} N \,m^{-1} \,C^{-1}$
C. $\hspace{1em} J \,C$
D. $\hspace{1em} J\, m^{-1} \,C^{-1}$

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Question 10

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medium

A body moves a distance of 1.5 $km$ in 10 $ks$ .

Which of the following gives the correct magnitudes of both of distance and time?

	Distance	Time
$\hspace{1.5em}$ A. $\hspace{1.5em}$	$\hspace{1.5em}1.5 \times 10^{-4}\, dm\hspace{1.5em}$	$\hspace{1.5em}10^{16}\, ps\hspace{1.5em}$
B.	$\hspace{1.5em}1.5 \times 10^{4}\, dm\hspace{1.5em}$	$\hspace{1.5em}10^{16} \, ps \hspace{1.5em}$
C.	$\hspace{1.5em}1.5 \times 10^{9} \, \mu m \hspace{1.5em}$	$\hspace{1.5em}10^{-16}\, ps\hspace{1.5em}$
D.	$\hspace{1.5em}1.5 \times 10^{-9}\, \mu m \hspace{1.5em}$	$\hspace{1.5em}10^{-16}\, ps\hspace{1.5em}$

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Question 11

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hard

The diagram shows a cube of side length $0.010\,m$ and a metal sphere of radius $0.5\,cm$ . The image below is not to scale.

PH0487 $\footnotesize{\textrm{[Source: OpenClipart-Vectors from Pixabay https://pixabay.com/vectors/ball-balls-glass-glow-glowing-1293319/ ]}}$

If there is a set of these spheres that could be melted down, what is the estimated number of spheres required to construct the cube from the material?

A. $\hspace{1em}$ 20
B. $\hspace{1em}$ 10
C. $\hspace{1em}$ 4
D. $\hspace{1em}$ 2

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