Physics: Magnetism And Electromagnetism: Units
Bayani Gaba-gaba
The magnetism and electromagnetism section draws on just three units, but each appears in key equations linking current, voltage and power in electromagnetic devices.
This reference covers the three SI units for this section: ampere, volt and watt, along with the contexts in which they appear in magnetism and electromagnetism questions.
Manufura
- Use the following units: ampere (A), volt (V) and watt (W)
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- The unit of current is: A) Volt B) Watt C) Ampere D) Ohm Answer: C
- A device draws 0.5 A from a 230 V supply. Its power is: A) 460 W B) 115 W C) 230.5 W D) 0.002 W Answer: B
- Induced voltage in a generator is measured in: A) Amperes B) Volts C) Watts D) Ohms Answer: B
- What is 200 mA in amperes? A) 20 A B) 2 A C) 0.2 A D) 0.02 A Answer: C
- Power is calculated using: A) P = V/I B) P = IR C) P = IV D) P = I/V Answer: C
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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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