Physics: Electricity: Units
Gbogbo ọrọ náà
Electricity calculations involve several quantities that look similar at first glance - current, charge, voltage, resistance, energy and power. Each has its own SI unit, and mixing them up is one of the fastest ways to lose marks in an exam.
This lesson lists the seven units the Edexcel specification requires for the Electricity section: ampere, coulomb, joule, ohm, second, volt and watt. You will learn what each one measures, how they connect through equations, and how to handle the metric prefixes that appear in real circuit problems.
Ebumnobi
- Use the following units: ampere (A), coulomb (C), joule (J), ohm (Ohm), second (s), volt (V) and watt (W)
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Nnyocha Ọmụmụ
Ekele diri gi maka imecha ihe karịrị na Physics: Electricity: Units. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- The SI unit of electric charge is: A) Ampere B) Volt C) Coulomb D) Watt Answer: C
- Resistance is measured in: A) volts B) amperes C) ohms D) watts Answer: C
- One volt is equivalent to: A) one joule per second B) one joule per coulomb C) one coulomb per second D) one watt per ampere Answer: B
- How many milliamps are in 1.5 A? A) 0.015 mA B) 15 mA C) 150 mA D) 1500 mA Answer: D
- Which quantity is measured in watts? A) Energy B) Charge C) Power D) Resistance Answer: C
Rue ajuju ndi a n'ime ngwa ahu
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Akwụkwọ A Na-atụ Aro
Mụtakwuo ihe site na isi mmalite mepere emepe
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Akụkụ akwụkwọ
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
Ndị otu ndị ọzọ bipụtara ha n'okpuru ikike mepere emepe, anyị na-ekele ha dị ka ha si chọọ. Njikọ na-emepe saịtị ha.
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Physics: Electricity: Units? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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