Electromagnetism
Bayani Gaba-gaba
Every fan, every washing machine drum and every loudspeaker cone moves for the same reason: a wire carrying a current, sitting in a magnetic field, gets pushed. Nothing touches it, and the push can be reversed by flicking a switch.
In this lesson you will see how a current creates a magnetic field of its own, why that field makes the wire feel a force when it meets another one, how to predict which way the force acts using Fleming's left-hand rule, and how motors and loudspeakers put the effect to work.
Manufura
- Know that an electric current in a conductor produces a magnetic field around it
- 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
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.
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.
- The magnetic field around a long straight current-carrying wire is: A) Straight lines along the wire B) Circles centred on the wire C) The same shape as a bar magnet field D) Uniform in all directions Answer: B
- Fleming's left-hand rule is used to find the direction of the: A) Magnetic field around a wire B) Current induced in a moving wire C) Force on a current-carrying wire in a magnetic field D) Current in a transformer Answer: C
- In Fleming's left-hand rule, the first finger represents the: A) Force B) Field C) Current D) Motion Answer: B
- The current in a wire between the poles of a magnet is reversed and the magnet is also turned round. The force on the wire: A) Is unchanged in direction B) Reverses direction C) Becomes zero D) Doubles in size Answer: A
- The force on a current-carrying wire in a magnetic field is zero when the wire is: A) At right angles to the field B) Parallel to the field C) Carrying a large current D) Between strong magnets 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.
Littattafan da ake ba da shawarar karantawa
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.
Sauke Manhajar Daga Google Playstore
Duk abin da kake buƙata don yin fice a JAMB, WAEC & NECO.
