{"id":131,"date":"2014-11-10T08:24:05","date_gmt":"2014-11-10T08:24:05","guid":{"rendered":"http:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphyprelimpractice\/ppp-exercise-5b\/"},"modified":"2014-11-25T08:05:53","modified_gmt":"2014-11-25T08:05:53","slug":"ppp-exercise-5b","status":"publish","type":"page","link":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphyprelimpractice\/ppp-exercise-5b\/","title":{"rendered":"PPP Exercise 5B"},"content":{"rendered":"<h2>Fuses<\/h2>\n<p><strong>1.<\/strong>\u00a0\u00a0 Draw the symbol for a fuse.<\/p>\n<p><strong>2.<\/strong>\u00a0\u00a0 By law, the plug of every electrical appliance sold in the UK must have the correct size of fuse fitted. Explain the purpose of the fuse in the plug.<\/p>\n<p><strong>3.\u00a0\u00a0 <\/strong>What is the danger if too large a fuse being used in a plug?<\/p>\n<p><strong>4.\u00a0\u00a0\u00a0\u00a0 <\/strong>Fuses for plugs are most commonly available as 3 A, 5 A and 13 A values.<\/p>\n<p>(<em>a<\/em>)\u00a0\u00a0 Calculate the current that is normally used by the following appliances and then state which size fuse would be used in the plug. All the appliances are connected to the mains at 230 V.<\/p>\n<p>(i)\u00a0\u00a0\u00a0 A 60 W table lamp.<\/p>\n<p>(ii)\u00a0\u00a0 A 2kW electric heater.<\/p>\n<p><a href=\"https:\/\/blogs.glowscotland.org.uk\/gc\/public\/hyndsecphyprelimpractice\/uploads\/sites\/5115\/2014\/11\/Picture41.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-full wp-image-184\" title=\"Picture4\" src=\"https:\/\/blogs.glowscotland.org.uk\/gc\/public\/hyndsecphyprelimpractice\/uploads\/sites\/5115\/2014\/11\/Picture41.png\" alt=\"\" width=\"272\" height=\"193\" \/><\/a>(iii)\u00a0 An 800 W microwave oven.<\/p>\n<p>(iv)\u00a0 A 500 W fridge-freezer.<\/p>\n<p>(<em>b<\/em>)\u00a0\u00a0 Why would a 3 A fuse be unsuitable for an 850 W mains sandwich toaster?<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Fuses 1.\u00a0\u00a0 Draw the symbol for a fuse. 2.\u00a0\u00a0 By law, the plug of every electrical appliance sold in the UK must have the correct size of fuse fitted. Explain the purpose of the fuse in the plug. 3.\u00a0\u00a0 What is the danger if too large a fuse being used in a plug? 4.\u00a0\u00a0\u00a0\u00a0 Fuses &hellip; <a href=\"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphyprelimpractice\/ppp-exercise-5b\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">PPP Exercise 5B<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2454,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"open","template":"","meta":{"footnotes":""},"class_list":["post-131","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphyprelimpractice\/wp-json\/wp\/v2\/pages\/131","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphyprelimpractice\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphyprelimpractice\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphyprelimpractice\/wp-json\/wp\/v2\/users\/2454"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphyprelimpractice\/wp-json\/wp\/v2\/comments?post=131"}],"version-history":[{"count":4,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphyprelimpractice\/wp-json\/wp\/v2\/pages\/131\/revisions"}],"predecessor-version":[{"id":187,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphyprelimpractice\/wp-json\/wp\/v2\/pages\/131\/revisions\/187"}],"wp:attachment":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphyprelimpractice\/wp-json\/wp\/v2\/media?parent=131"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}