Part of an electric circuit is shown in Fig. 5.1. The circuit is used to produce half-wave rectification of an alternating voltage of potential difference (p.d.) $$$V_{\text {IN }}$$$. The output p.d. across the $$$14 \mathrm{k} \Omega$$$ resistor is $$$V_{\text {OUT }}$$$. Fig. 5.2 shows the variation with time $$$t$$$ of $$$V_{\mathrm{IN}}$$$. Fig. 5.3 shows the variation with $$$t$$$ of $$$V_{\text {OUT }}$$$. Determine the frequency of $$$V_{\mathbb{I N}}$$$. frequency $$$=$$$ $$$\mathrm{Hz}$$$

Physics

IGCSE&ALevel

CAIE

Exam No：9702_s23_qp_41 Year：2023 Question No：5(b)(i)

Answer:

$\begin{aligned} \text { frequency } & =1 / 0.04 \\ & =25 \mathrm{~Hz}\end{aligned}$

Knowledge points:

1.1.1 understand that all physical quantities consist of a numerical magnitude and a unit.

1.1.2 make reasonable estimates of physical quantities included within the syllabus

1.2.1 recall the following SI base quantities and their units: mass (kg), length (m), time (s), current (A), temperature (K), amount of substance (mol)

1.2.2 express derived units as products or quotients of the SI base units and use the named units listed in this syllabus as appropriate

1.2.3 use SI base units to check the homogeneity of physical equations

1.2.4 use the following prefixes and their symbols to indicate decimal submultiples or multiples of both base and derived units: pico (p), nano (n), micro (μ), milli (m), centi (c), deci (d), kilo (k), mega (M), giga (G), tera (T)

1.2.5 understand and use the conventions for labelling graph axes and table columns as set out in the ASE publication Signs, Symbols and Systematics (The ASE Companion to 16–19 Science, 2000)

Answer:

Knowledge points:

Solution:

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