Current And Voltage In Circuits
Akopọ
Every electronic device you use relies on electric current flowing through a circuit. Understanding how current and voltage behave in different circuit arrangements is essential for predicting how components work together.
In this lesson you will learn what current and voltage really measure, how to use Ohm's law to calculate resistance, and how current and voltage distribute themselves in series circuits. You will also explore I-V characteristics for resistors, filament lamps and diodes - a favourite topic on Edexcel papers.
Awọn Afojusun
- Understand how the current in a series circuit depends on the applied voltage and the number and nature of other components
- Describe how current varies with voltage in wires, resistors and metal filament lamps, and how to investigate this experimentally
- Describe the qualitative effect of changing resistance on the current in a circuit
- Know that lamps and LEDs can be used to indicate the presence of a current in a circuit
- Know and use the relationship between voltage, current and resistance: V = I x R
- Know that current is the rate of flow of charge
- Know that electric current in solid metallic conductors is a flow of negatively charged electrons
- Calculate the currents, voltages and resistances of two resistive components connected in a series circuit
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Oriire fun ipari ẹkọ lori Current And Voltage In Circuits. Ni bayi ti o ti ṣawari naa awọn imọran bọtini ati awọn imọran, o to akoko lati fi imọ rẹ si idanwo. Ẹka yii nfunni ni ọpọlọpọ awọn adaṣe awọn ibeere ti a ṣe lati fun oye rẹ lokun ati ṣe iranlọwọ fun ọ lati ṣe iwọn oye ohun elo naa.
Iwọ yoo pade adalu awọn iru ibeere, pẹlu awọn ibeere olumulo pupọ, awọn ibeere idahun kukuru, ati awọn ibeere iwe kikọ. Gbogbo ibeere kọọkan ni a ṣe pẹlu iṣaro lati ṣe ayẹwo awọn ẹya oriṣiriṣi ti imọ rẹ ati awọn ogbon ironu pataki.
Lo ise abala yii gege bi anfaani lati mu oye re lori koko-ọrọ naa lagbara ati lati ṣe idanimọ eyikeyi agbegbe ti o le nilo afikun ikẹkọ. Maṣe jẹ ki awọn italaya eyikeyi ti o ba pade da ọ lójú; dipo, wo wọn gẹgẹ bi awọn anfaani fun idagbasoke ati ilọsiwaju.
- Electric current in a metal wire is a flow of: A) Protons B) Neutrons C) Electrons D) Ions Answer: C
- An ammeter should be connected: A) In parallel with the component B) In series with the component C) Across the battery D) It does not matter Answer: B
- Two resistors of 6 ohms and 4 ohms are connected in series. What is the total resistance? A) 2.4 ohms B) 10 ohms C) 24 ohms D) 1.5 ohms Answer: B
- The I-V graph for an ohmic conductor is: A) A curve through the origin B) A straight line through the origin C) A horizontal line D) A line that starts at 0.7 V Answer: B
- In a series circuit, the current: A) Is largest near the battery B) Splits between components C) Is the same at all points D) Depends on the voltmeter reading Answer: C
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Awọn Iwe Itọsọna Ti a Gba Nimọran
Ẹ̀kọ́ síwájú láti àwọn orísun ṣíṣí
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Abala ìwé ẹ̀kọ́
Ohm's law
Describe how current is related to charge and time, and distinguish between direct current and alternating current
"Physics: Ohm's law" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/physics/pages/19-1-ohms-law. Access for free at https://openstax.org/books/physics/pages/1-introduction
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Abala ìwé ẹ̀kọ́
Series Circuits
Interpret circuit diagrams and diagram basic circuit elements
"Physics: Series Circuits" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/physics/pages/19-2-series-circuits. Access for free at https://openstax.org/books/physics/pages/1-introduction
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