IB Physics HL S1.3.3 Units and Numerical Values Questions

Use HL SI units, prefixes and numerical conversions correctly when calculating momentum, energy and other physical quantities.

Exam points

identify correct SI units for derived quantities such as momentum and distinguish common unit distractors
convert between SI prefixes and electronvolts or joules when interpreting numerical physics data
check numerical answers for unit consistency, powers of ten, significant figures and appropriate scale

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Study S1.3.3—Units and numerical values conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

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A rod, R , lies perpendicular to a uniform magnetic field B of strength 0.50 T directed into the plane of the page. R is connected to a circuit and the electric current $I_{\mathrm{R}}$ is 2.0 A .

$\quad B$ is removed and a wire Z, carrying a current $I_{Z}$ , is placed parallel to R.

Figure for Question IB Physics HL S1.3.3 Units and Numerical Values Questions question 1 — IB Physics HL

Derive the units of $\mu_{0}$ in SI fundamental units.

$\mathrm{kg} \mathrm{m} \mathrm{s}^{-2} \mathrm{~A}^{-2}$

Marking guidance:

Allow fractional answers such as:
$\frac{k g m}{s^{2} A^{2}}$

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IB Physics HL S1.3.3 Units and Numerical Values Questions question 1