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Student & Learning Zone - City & Guilds
Be posting soon level 2 2330 unit 202 and 203
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<blockquote data-quote="welshwizard" data-source="post: 185" data-attributes="member: 3"><p><strong>POWER</strong></p><p></p><p>1/. Calculate the current demanded by a 60 W, a 100 W, and a 15o W lamp when they are connected to a 230 V supply.</p><p></p><p>2/. The insulation resistance between two conductors is 0.5 MΩ. The p.d. between the two conductors is 200 V, what will be:</p><p></p><p>a). the leakage current</p><p></p><p>B). the power loss.</p><p></p><p><strong>Transformer Ratios:</strong></p><p></p><p>1/. A 400/230 V single-phase transformer has a primary current of 12 A. Determine the secondary current.</p><p></p><p>2/. A single-phase transformer reduces the voltage from 230 V to 6 V. If the secondary winding has 10 turns of wire on it and the primary has a current of 2.5 A, what will be:</p><p></p><p>i/. the number ot turns on the primary winding?</p><p></p><p>ii/. the current in the secondary?</p><p></p><p>Electrician Forum 2008 (<a href="http://www.electricianforum.co.uk/" target="_blank">www.electricianforum.co.uk</a>)</p></blockquote><p></p>
[QUOTE="welshwizard, post: 185, member: 3"] [B]POWER[/B] 1/. Calculate the current demanded by a 60 W, a 100 W, and a 15o W lamp when they are connected to a 230 V supply. 2/. The insulation resistance between two conductors is 0.5 MΩ. The p.d. between the two conductors is 200 V, what will be: a). the leakage current B). the power loss. [B]Transformer Ratios:[/B] 1/. A 400/230 V single-phase transformer has a primary current of 12 A. Determine the secondary current. 2/. A single-phase transformer reduces the voltage from 230 V to 6 V. If the secondary winding has 10 turns of wire on it and the primary has a current of 2.5 A, what will be: i/. the number ot turns on the primary winding? ii/. the current in the secondary? Electrician Forum 2008 ([URL="http://www.electricianforum.co.uk/"]www.electricianforum.co.uk[/URL]) [/QUOTE]
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Be posting soon level 2 2330 unit 202 and 203
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