Electromagnetism
Bayani Gaba-gaba
Every electric motor, every loudspeaker and every MRI scanner relies on the same principle: a current flowing through a magnetic field experiences a force. Electromagnetism connects electricity to magnetism and puts that connection to work in devices you use every day.
In this lesson you will trace the magnetic field around a current-carrying wire, build it into a solenoid, strengthen it into an electromagnet, and then apply Fleming's left-hand rule to predict forces. You will see how those forces drive a d.c. motor and make a loudspeaker cone vibrate to produce sound.
Manufura
- Know that an electric current in a conductor produces a magnetic field around it
- Describe the construction of electromagnets
- Draw magnetic field patterns for a straight wire, a flat circular coil and a solenoid when each is carrying a current
- Know that there is a force on a charged particle when it moves in a magnetic field as long as its motion is not parallel to the field
- Understand why a force is exerted on a current-carrying wire in a magnetic field and how this effect is applied in simple d.c. electric motors and loudspeakers
- Use the left-hand rule to predict the direction of the resulting force when a wire carries a current perpendicular to a magnetic field
- Describe how the force on a current-carrying conductor in a magnetic field changes with the magnitude and direction of the field and current
Takardar Darasi
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Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
Nazarin Darasi
Barka da kammala darasi akan Electromagnetism. 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.
- What shape is the magnetic field around a straight current-carrying wire? A) Straight parallel lines B) Concentric circles C) Radial lines pointing outward D) A single loop Answer: B
- Which of the following will NOT increase the strength of an electromagnet? A) Increasing the current B) Adding more turns to the coil C) Using a copper core D) Using a soft iron core Answer: C
- In Fleming's left-hand rule, what does the thumb represent? A) Current B) Magnetic field C) Force D) Voltage Answer: C
- A wire carries a current of 6.0 A through a 0.50 T field. The wire is 0.20 m long. What is the force on the wire? A) 0.06 N B) 0.60 N C) 6.0 N D) 60 N Answer: B
- What is the role of the split-ring commutator in a d.c. motor? A) It increases the current B) It reverses the current direction every half-turn C) It strengthens the magnetic field D) It provides the power supply Answer: B
Akwai a cikin manhajar Green Bridge
Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
Akwai a cikin manhajar Green Bridge
Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
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Yi Aikin Tambayoyin Gwaji
Kana son yin aikin tambayoyin gwaji kan Electromagnetism? Sauke manhajar Green Bridge CBT don samun tambayoyin gwaji da cikakkun jarrabawa akan wannan batu.
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