{"id":88979,"date":"2025-06-01T07:26:08","date_gmt":"2025-06-01T07:26:08","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=88979"},"modified":"2025-06-01T07:26:08","modified_gmt":"2025-06-01T07:26:08","slug":"what-will-happen-if-a-collection-of-positive-and-negative-charges-are","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/what-will-happen-if-a-collection-of-positive-and-negative-charges-are\/","title":{"rendered":"What will happen if a collection of positive and negative charges are"},"content":{"rendered":"

What will happen if a collection of positive and negative charges are passed at a high speed through a magnetic field which is perpendicular to the direction of motion of the charges ? (Assume that both kind of charges are NOT going to recombine)<\/p>\n

[amp_mcq option1=”Both kind of charges will stop moving” option2=”Positive charges and negative charges will separate out” option3=”Positive charges will stop but negative charges will continue moving uninterrupted” option4=”Both kind of charges will keep moving uninterrupted” correct=”option2″]<\/p>\n

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This question was previously asked in<\/div>\n
UPSC NDA-2 – 2023<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
When a collection of positive and negative charges are passed at high speed through a magnetic field perpendicular to their motion, the positive and negative charges will separate out.<\/section>\n
The Lorentz force ($\\vec{F} = q(\\vec{v} \\times \\vec{B})$) acts on a moving charge in a magnetic field. The force is perpendicular to both the velocity ($\\vec{v}$) and the magnetic field ($\\vec{B}$). For positive charges, the force direction is given by the right-hand rule applied to $\\vec{v} \\times \\vec{B}$. For negative charges (where $q$ is negative), the force is in the opposite direction. This difference in the direction of the force causes the positive and negative charges to be deflected in opposite directions, leading to separation.<\/section>\n
This principle is utilized in devices like mass spectrometers or velocity selectors to separate charged particles based on their mass-to-charge ratio or velocity. The charges will move in curved paths, not stop or continue uninterrupted, as long as they are within the magnetic field.<\/section>\n","protected":false},"excerpt":{"rendered":"

What will happen if a collection of positive and negative charges are passed at a high speed through a magnetic field which is perpendicular to the direction of motion of the charges ? (Assume that both kind of charges are NOT going to recombine) [amp_mcq option1=”Both kind of charges will stop moving” option2=”Positive charges and … <\/p>\n

Detailed SolutionWhat will happen if a collection of positive and negative charges are<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1094],"tags":[1105,1201,1128],"class_list":["post-88979","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-2","tag-1105","tag-electric-current","tag-physics","no-featured-image-padding"],"yoast_head":"\nWhat will happen if a collection of positive and negative charges are<\/title>\n<meta name=\"description\" content=\"When a collection of positive and negative charges are passed at high speed through a magnetic field perpendicular to their motion, the positive and negative charges will separate out. The Lorentz force ($vec{F} = q(vec{v} times vec{B})$) acts on a moving charge in a magnetic field. The force is perpendicular to both the velocity ($vec{v}$) and the magnetic field ($vec{B}$). For positive charges, the force direction is given by the right-hand rule applied to $vec{v} times vec{B}$. For negative charges (where $q$ is negative), the force is in the opposite direction. This difference in the direction of the force causes the positive and negative charges to be deflected in opposite directions, leading to separation.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/what-will-happen-if-a-collection-of-positive-and-negative-charges-are\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What will happen if a collection of positive and negative charges are\" \/>\n<meta property=\"og:description\" content=\"When a collection of positive and negative charges are passed at high speed through a magnetic field perpendicular to their motion, the positive and negative charges will separate out. The Lorentz force ($vec{F} = q(vec{v} times vec{B})$) acts on a moving charge in a magnetic field. The force is perpendicular to both the velocity ($vec{v}$) and the magnetic field ($vec{B}$). For positive charges, the force direction is given by the right-hand rule applied to $vec{v} times vec{B}$. For negative charges (where $q$ is negative), the force is in the opposite direction. This difference in the direction of the force causes the positive and negative charges to be deflected in opposite directions, leading to separation.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/what-will-happen-if-a-collection-of-positive-and-negative-charges-are\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T07:26:08+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"What will happen if a collection of positive and negative charges are","description":"When a collection of positive and negative charges are passed at high speed through a magnetic field perpendicular to their motion, the positive and negative charges will separate out. 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