{"id":234562,"date":"2025-06-14T08:39:54","date_gmt":"2025-06-14T08:39:54","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=234562"},"modified":"2025-06-14T08:39:56","modified_gmt":"2025-06-14T08:39:56","slug":"list-of-equations-1-coulombs-law-f-kq1q2-r2-2-electric-field-of-a-point-charge-e-kq-r2-3-force-on-a-charge-in-an-electric-field-f-qe-4","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/14\/list-of-equations-1-coulombs-law-f-kq1q2-r2-2-electric-field-of-a-point-charge-e-kq-r2-3-force-on-a-charge-in-an-electric-field-f-qe-4\/","title":{"rendered":"List of equations: 1. Coulomb’s Law: F = kq1q2\/r^2 2. Electric Field of a point charge: E = kq\/r^2 3. Force on a charge in an Electric Field: F = qE 4"},"content":{"rendered":"\n

List of equations: 1. Coulomb’s Law: F = kq1q2\/r^2 2. Electric Field of a point charge: E = kq\/r^2 3. Force on a charge in an Electric Field: F = qE 4. Electric potential energy: U = qV 5. Electric potential of a charge: V = kq\/r 6. Electric Current: I = q\/t 7. Ohm’s Law: V = IR 8. Power: P = IV = I^2R = V^2\/R 9. Magnetic force on a moving charge: F = qvBsin(theta) 10. Force on a current carrying wire: F = BILsin(theta) 11. Torque on a loop of N turns of wire: T = NIABsin(theta) 12. Magnetic field of a long straight wire: B = (mu0I)\/(2<\/em>pir) 13. Magnetic Flux: Phi = BAcos(theta) 14. Induced emf (voltage) in a coil: E = -N(dPhi\/dt) 15. Mirror\/Thin lens equation: 1\/f = 1\/do + 1\/di 16. Doppler Shift: f’ = f(1 + v\/c) 17. Interference: m<\/em>lambda = dsin(theta) (bright) or (m + 1\/2)<\/em>lambda = dsin(theta) (dark) 18. Energy of a photon: E = hf = hc\/lambda, h = 6.63<\/em>10^-34 Js, c = 310^8 m\/s 19. Photoelectric Effect: Kmax = hf – Wo 20. Radioactive decay: N = No<\/em>e^(-lambda*t)<\/p>\n\n\n\n

The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n

Correct Answer:<\/strong> This is a list of fundamental equations in electricity, magnetism, optics, and modern physics. Each expression connects physical quantities central to understanding how energy, forces, and motion behave under different conditions.<\/p>\n\n\n\n

\n\n\n\n

Explanation<\/strong><\/p>\n\n\n\n

These 20 equations form the backbone of classical and modern physics.<\/p>\n\n\n\n

    \n
  1. Coulomb\u2019s Law:<\/strong> Describes the force between two point charges, where the force is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.<\/li>\n\n\n\n
  2. Electric Field of a Point Charge:<\/strong> Indicates how a charge generates an electric field in the surrounding space, influencing other charges.<\/li>\n\n\n\n
  3. Force on a Charge in an Electric Field:<\/strong> Calculates the force a charge experiences when placed in an electric field.<\/li>\n\n\n\n
  4. Electric Potential Energy:<\/strong> Measures the stored energy due to a charge\u2019s position within an electric field.<\/li>\n\n\n\n
  5. Electric Potential (Voltage):<\/strong> Defines the work done per unit charge in bringing a small positive test charge from infinity to a point.<\/li>\n\n\n\n
  6. Electric Current:<\/strong> Expresses current as the rate of flow of electric charge over time.<\/li>\n\n\n\n
  7. Ohm\u2019s Law:<\/strong> Relates voltage, current, and resistance in a conductor.<\/li>\n\n\n\n
  8. Power in Electric Circuits:<\/strong> Offers three interchangeable forms to calculate electrical power depending on known variables.<\/li>\n\n\n\n
  9. Magnetic Force on a Moving Charge:<\/strong> Computes the force on a charge moving through a magnetic field, dependent on the angle between velocity and the field.<\/li>\n\n\n\n
  10. Force on a Current-Carrying Wire:<\/strong> Similar to equation 9 but for a wire with current.<\/li>\n\n\n\n
  11. Torque on a Wire Loop:<\/strong> Describes the rotational force on a loop of wire in a magnetic field.<\/li>\n\n\n\n
  12. Magnetic Field of a Straight Wire:<\/strong> Gives the magnetic field strength around a current-carrying wire.<\/li>\n\n\n\n
  13. Magnetic Flux:<\/strong> Quantifies the total magnetic field passing through a given area.<\/li>\n\n\n\n
  14. Induced EMF:<\/strong> Shows how a changing magnetic flux induces voltage in a coil.<\/li>\n\n\n\n
  15. Mirror\/Lens Equation:<\/strong> Used to find image or object distances in geometric optics.<\/li>\n\n\n\n
  16. Doppler Shift:<\/strong> Adjusts frequency for relative motion between source and observer.<\/li>\n\n\n\n
  17. Interference Equations:<\/strong> Determine the conditions for constructive or destructive interference in waves.<\/li>\n\n\n\n
  18. Photon Energy:<\/strong> Connects a photon\u2019s energy with frequency or wavelength.<\/li>\n\n\n\n
  19. Photoelectric Effect:<\/strong> Defines the maximum kinetic energy of electrons ejected by light.<\/li>\n\n\n\n
  20. Radioactive Decay:<\/strong> Models how the number of radioactive nuclei decreases over time.<\/li>\n<\/ol>\n\n\n\n

    Mastery of these equations enables strong comprehension of physics across many fields.<\/p>\n\n\n\n

    \"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"

    List of equations: 1. Coulomb’s Law: F = kq1q2\/r^2 2. Electric Field of a point charge: E = kq\/r^2 3. Force on a charge in an Electric Field: F = qE 4. Electric potential energy: U = qV 5. Electric potential of a charge: V = kq\/r 6. Electric Current: I = q\/t 7. Ohm’s […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-234562","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/234562","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=234562"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/234562\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=234562"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=234562"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=234562"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}