https://www.khanacademy.org/science/highschool-physics/x6679aa2c65c01e53:electrostatics/x6679aa2c65c01e53:static-electricity/v/static_electricity 2024-07-01T11:54:52.194339821Z Static electricity Most macroscopic objects are electrically neutral most of the time. However, objects can develop a static net charge if they pick up extra electrons or lose some electrons. This can happen through friction. Objects with opposite net charges attract, and objects with like net charges repel. It's also possible for a net neutral object to be attracted to a charged object. This happens because atoms near the surface of the neutral object become polarized. Mahesh Shenoy video https://cdn.kastatic.org/ka_thumbnails_cache/a960a780-48f2-4140-8a3c-6c68243ea924_1280_720_base.png Static electricity Most macroscopic objects are electrically neutral most of the time. However, objects can develop a static net charge if they pick up extra electrons or lose some electrons. This can happen through friction. Objects with opposite net charges attract, and objects with like net charges repel. It's also possible for a net neutral object to be attracted to a charged object. This happens because atoms near the surface of the neutral object become polarized. https://cdn.kastatic.org/ka-youtube-converted/D5pJKu_QjRo.mp4/D5pJKu_QjRo.mp4 559 Charging by rubbing, Types of charges & their interaction https://www.khanacademy.org/science/highschool-physics/x6679aa2c65c01e53:electrostatics/x6679aa2c65c01e53:static-electricity/e/apply-static-electricity 2026-03-26T05:20:35.16058035Z Apply: static electricity Apply your knowledge of static electricity in this set of free practice questions. Emily Cizmas exercise https://www.khanacademy.org/science/physics/discoveries/electrostatics/v/pith-ball-electroscope 2021-02-07T17:14:01Z Pith ball electroscope Primitive device for measuring electrostatic force Brit Cruise video https://cdn.kastatic.org/googleusercontent/oWhjWpm7V1kfPzAhRoMu7aK2UKvTNYvnPIfq-U0SBXf3915ZdMRD5qzRWcpuyCrd04ibsvFw19zkXRdRwFZx-zI Pith ball electroscope Primitive device for measuring electrostatic force https://cdn.kastatic.org/ka-youtube-converted/3B3gBDPBAFs.mp4/3B3gBDPBAFs.mp4 39 Charging by rubbing, Types of charges & their interaction https://www.khanacademy.org/science/physics/discoveries/electrostatics/v/foil-leaf-electroscope 2021-02-07T17:14:00Z Foil leaf electroscope Foil Leaf Electroscope. Aluminum leaves repel in the presence of a charged object Brit Cruise video https://cdn.kastatic.org/googleusercontent/y92ng0rSbWekx12-tGueW0dru6XdL0eTkYXgILbnh2PwGeT2BKXsTAQ7guToPU5hibHZrTOELbk6hiWIJqitWhyZ3Q Foil leaf electroscope Foil Leaf Electroscope. Aluminum leaves repel in the presence of a charged object https://cdn.kastatic.org/ka-youtube-converted/Evo0sf5FztI.mp4/Evo0sf5FztI.mp4 52 Charging by rubbing, Types of charges & their interaction https://www.khanacademy.org/science/bridge-course-class-10th-science/x37589313f9a4c197:week-5/x37589313f9a4c197:electricity/e/repulsion-and-attraction-between-objects 2026-04-02T07:12:18.903875215Z Repulsion and attraction between charged and uncharged objects Let's look at how some objects get repelled from and attracted towards each other and why it happens so. Revathi exercise https://www.khanacademy.org/science/bridge-course-class-10th-science/x37589313f9a4c197:week-5/x37589313f9a4c197:electricity/e/attraction-of-uncharged-object-to-a-charged-object 2025-04-15T05:52:10.616029005Z Attraction of uncharged object to a charged object Let's look at how an uncharged object can get attracted to a charged object. Revathi exercise https://www.khanacademy.org/science/bridge-course-class-10th-science/x37589313f9a4c197:week-5/x37589313f9a4c197:electricity/e/types-of-charges 2025-07-26T10:57:14.757595759Z Charges Let's solve some problems to better understand the types of charges. Aakash Bagga exercise