{"id":2284,"date":"2023-03-10T13:19:16","date_gmt":"2023-03-10T12:19:16","guid":{"rendered":"https:\/\/mxth.dk\/?page_id=2284"},"modified":"2023-08-23T20:01:33","modified_gmt":"2023-08-23T18:01:33","slug":"f11-sammenhaengen-mellem-stroemstyrke-og-spaendingsfald","status":"publish","type":"page","link":"https:\/\/mxth.dk\/?page_id=2284","title":{"rendered":"F11 – sammenh\u00e6ngen mellem str\u00f8mstyrke og sp\u00e6ndingsfald"},"content":{"rendered":"\n
<\/span>
<\/div>

FORS\u00d8G<\/p>\n\n

sammenh\u00e6ngen mellem str\u00f8mstyrke og sp\u00e6ndingsfald<\/p><\/div><\/div>\n\n\n

Photo by Jarvik Joshi<\/a> on Unsplash<\/a><\/p>\n\n\n

Form\u00e5l<\/h3>\n\n\n\n

Vi skal unders\u00f8ge sammenh\u00e6ngen mellem str\u00f8mstyrke og sp\u00e6ndingsfald.<\/p>\n\n\n\n

Materialer<\/h3>\n\n\n
    \n
  • str\u00f8mforsygning<\/li>\n\n\n\n
  • 2 multimetre<\/li>\n\n\n\n
  • ledninger<\/li>\n\n\n\n
  • krokkodillen\u00e6b<\/li>\n\n\n\n
  • breadboard<\/li>\n\n\n\n
  • jumper wires<\/li>\n\n\n\n
  • komponenter (p\u00e6re\/modstand\/diode)<\/li>\n<\/ul>\n\n\n

    Fremgangsm\u00e5de<\/h3>\n\n\n\n

    Lav et kredsl\u00f8b p\u00e5 breadboardet med en modstand, se billede herunder.<\/p>\n\n\n\n

    \"\"
    Kredsl\u00f8b med en p\u00e6rer<\/figcaption><\/figure>\n\n\n\n

    Tilslut et multimeter i serie med modstanden og tilslut det andet i parallelforbindelse med modstanden, se billederne herunder.<\/p>\n\n\n\n

    \n
    \"\"
    Tilslutning af amperemeter<\/figcaption><\/figure>\n\n\n\n
    \"\"
    Tilslutning af voltmeter<\/figcaption><\/figure>\n<\/figure>\n\n\n\n

    Varier nu str\u00f8mstyrken (A) og sp\u00e6ndingen (V) og noter i et skema v\u00e6rdierne for begge. OBS find ud af hvad maksimum er ved at afl\u00e6se p\u00e5 p\u00e6ren<\/strong>.<\/p>\n\n\n\n

    Databehandling<\/h3>\n\n\n\n

    Lav et afbildning af datapunkterne, hvor str\u00f8mstyrken (I<\/em>) er ud af f\u00f8rste aksen (x-aksen<\/em>) og sp\u00e6ndingensfaldet (U<\/em>) er ud af anden aksen (y-aksen<\/em>).<\/p>\n\n\n\n

    Hvad kan I sige omkring datapunkterne? Kan I sige noget om sammenh\u00e6ngen mellem str\u00f8mstyrken og sp\u00e6ndingsfaldet?<\/p>\n\n\n\n

    Lav en line\u00e6r regression over datapunkterne. Hvad kan I sige om modstanden?<\/p>\n\n\n\n

    M\u00e5l modstanden p\u00e5 p\u00e6ren med et multimeter (sp\u00f8rg hvordan I m\u00e5ler dette<\/em>). Passer den v\u00e6rdi med det som I har udregnet? (beregn den relative afvigelse<\/em>).<\/p>\n\n\n\n

    Hvad kan forklaringen v\u00e6re p\u00e5 at det ikke passer helt?<\/p>\n\n\n\n

    Sp\u00f8rgsm\u00e5l<\/h3>\n\n\n\n

    Hvis str\u00f8mstyrken i et kredsl\u00f8b er 10 A og sp\u00e6ndingsfaldet er 230 V, hvor stor er modstanden s\u00e5?<\/p>\n\n\n\n

    Hvis modstanden i et kredsl\u00f8b er 8 \\(\\small\\Omega\\) og sp\u00e6ndingsfaldet er 220 V, hvor stor er str\u00f8mstyrken s\u00e5?<\/p>\n\n\n\n

    Hvor stor er sp\u00e6ndingsfaldet n\u00e5r modstanden er 2 \\(\\small\\Omega\\) og str\u00f8mstyrken er 1,5 A?<\/p>\n\n\n\n

    Et bilbatteri kan levere 12 V og modstanden er p\u00e5 8 \\(\\small\\Omega\\), hvor stor er str\u00f8mstyrken?<\/p>\n\n\n\n

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

    Vi skal unders\u00f8ge sammenh\u00e6ngen mellem str\u00f8mstyrke og sp\u00e6ndingsfald.<\/p>\n","protected":false},"author":1,"featured_media":2288,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"ub_ctt_via":"","editor_plus_copied_stylings":"{}","footnotes":""},"categories":[27,2],"tags":[],"class_list":["post-2284","page","type-page","status-publish","has-post-thumbnail","hentry","category-forsoeg","category-fysik"],"featured_image_src":"https:\/\/i0.wp.com\/mxth.dk\/wp-content\/uploads\/2023\/03\/jarvik-joshi-yjgE1xjyv60-unsplash-scaled.jpg?fit=2560%2C1707&ssl=1","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/pages\/2284","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2284"}],"version-history":[{"count":15,"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/pages\/2284\/revisions"}],"predecessor-version":[{"id":2571,"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/pages\/2284\/revisions\/2571"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/media\/2288"}],"wp:attachment":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2284"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2284"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2284"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}