Physics: Magnetism And Electromagnetism: Units
Bayani Gaba-gaba
An electromagnet, a loudspeaker and an electric motor are all described by just three units: the ampere, the volt and the watt. Between them they answer how much charge is flowing, how hard it is being pushed, and how fast energy is being delivered.
In this lesson you will meet each of the three, see how the volt and the watt are built out of simpler units, practise the prefix conversions that appear on every device label, and use units as a quick check that a calculation has been set up the right way round.
Manufura
- Use the following units: ampere (A), volt (V) and watt (W)
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Nazarin Darasi
Barka da kammala darasi akan Physics: Magnetism And Electromagnetism: Units. Yanzu da kuka bincika mahimman ra'ayoyi da ra'ayoyi, 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 current is the: A) Volt B) Watt C) Ampere D) Coulomb Answer: C
- One volt is the same as: A) One joule per second B) One joule per coulomb C) One coulomb per second D) One watt per second Answer: B
- A device works at 12 V and draws 3 A. Its power is: A) 4 W B) 9 W C) 15 W D) 36 W Answer: D
- 250 mA expressed in amperes is: A) 0.025 A B) 0.25 A C) 2.5 A D) 250 000 A Answer: B
- One watt is the same as: A) One joule per coulomb B) One joule per second C) One coulomb per second D) One volt per ampere Answer: B
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Yi aikin wadannan tambayoyi a cikin manhaja
Littattafan da ake ba da shawarar karantawa
Ƙarin koyo daga tushe na buɗe
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Sashen littafi
The Language of Physics: Physical Quantities and Units
Associate physical quantities with their International System of Units (SI)and perform conversions among SI units using scientific notation
"Physics: The Language of Physics: Physical Quantities and Units" 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/1-3-the-language-of-physics-physical-quantities-and-units. Access for free at https://openstax.org/books/physics/pages/1-introduction
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