Physics: Electricity: Units
Bayani Gaba-gaba
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.
Manufura
- Use the following units: ampere (A), coulomb (C), joule (J), ohm (Ohm), second (s), volt (V) and watt (W)
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Barka da kammala darasi akan Physics: Electricity: Units. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
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- 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
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Littattafan da ake ba da shawarar karantawa
Ƙarin koyo daga tushe na buɗe
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Sashen littafi
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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