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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.

Takardar Darasi

Magnetism questions are more qualitative than most physics topics in the Double Award specification - field patterns, poles, attraction and repulsion are described in words and diagrams rather than calculated. But once a question moves from a permanent magnet to an electromagnet, a motor or a generator, numbers start appearing: the current in a coil, the voltage a device runs on, the power it delivers. These three units are the complete list the specification requires for this section, and every calculation question in magnetism and electromagnetism draws only on these.

Nazarin Darasi

Barka da kammala darasi akan Physics: Magnetism And Electromagnetism: 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.

Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.

Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.

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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Physics: Magnetism And Electromagnetism: Units

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Takardar Darasi

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Nazarin Darasi

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