{"id":343503,"date":"2023-01-06T13:26:37","date_gmt":"2023-01-06T07:56:37","guid":{"rendered":"https:\/\/infinitylearn.com\/surge\/question\/an-electric-kettle-consumes-1-kw-of-electric-power-when-operated-at-220-v-a-fuse-wire-of-what-rating-must-be-used-for-it\/"},"modified":"2025-06-26T18:03:22","modified_gmt":"2025-06-26T12:33:22","slug":"an-electric-kettle-consumes-1-kw-of-electric-power-when-operated-at-220-v-a-fuse-wire-of-what-rating-must-be-used-for-it","status":"publish","type":"questions","link":"https:\/\/infinitylearn.com\/surge\/question\/physics\/an-electric-kettle-consumes-1kw-of-electric-power-when-oper\/","title":{"rendered":"An electric kettle consumes 1\u00a0kW of electric power when operated at 220\u00a0V. A fuse wire of what rating must be used for it?"},"content":{"rendered":"","protected":false},"author":1,"template":"","meta":{"_yoast_wpseo_focuskw":"","_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"An electric kettle consumes 1\u00a0kW of electric power when operated at 220\u00a0V. A fuse wire of what rating must be used for it?","custom_permalink":"question\/physics\/an-electric-kettle-consumes-1kw-of-electric-power-when-oper\/"},"categories":[],"acf":{"question":"

An electric kettle consumes <\/span>1<\/mn> kW<\/mi><\/math> of electric power when operated at <\/span>220<\/mn> V<\/mi><\/math>. A fuse wire of what rating must be used for it?<\/span><\/p>

<\/p>

<\/p><\/spanstyle=\"font-family:'timesnewroman';-aw-import:ignore\"><\/pstyle=\"margin-top:0pt;margin-bottom:8pt;line-height:108%;font-size:12pt\"><\/spanstyle=\"font-family:'timesnewroman';-aw-import:ignore\"><\/pstyle=\"margin-top:0pt;margin-bottom:8pt;line-height:108%;font-size:12pt\">","options":[{"option":"1<\/mn> A<\/mi><\/math>","correct":false},{"option":"2<\/mn> A<\/mi><\/math>","correct":false},{"option":"4<\/mn> A<\/mi><\/math>","correct":false},{"option":"4<\/mn>.<\/mo>5<\/mn> A<\/mi><\/math> <\/span>","correct":true}],"solution":"An electric kettle consumes <\/span>1<\/mn> kW<\/mi><\/math> of electric power when operated at <\/span>220<\/mn> V<\/mi><\/math>. A fuse wire of <\/span>4<\/mn>.<\/mo>5<\/mn> A<\/mi><\/math> rating must be used for it.<\/span>
Firstly, calculate the max current required by the electric kettle<\/span>
Given data in the problem,<\/span>
Power, <\/span>P <\/mi>=<\/mo>1<\/mn>KW<\/mi><\/math>
                 <\/span>=<\/mo>1000<\/mn>W<\/mi><\/math> <\/span>Voltage, <\/span>V<\/mi>=<\/mo>220<\/mn> V<\/mi><\/math>
By using the below formula of Power<\/span>
Power, <\/span>P<\/mi>=<\/mo>V <\/mi>\u00d7<\/mo> I<\/mi><\/math>, where, <\/span>I<\/mi><\/math> is current and <\/span>V<\/mi><\/math> is voltage.<\/span>
By rearranging the above equation,<\/span>
\u21d2<\/mo>I <\/mi>=<\/mo> <\/mi>P<\/mi><\/mrow>V<\/mi><\/mrow><\/mfrac><\/math> <\/span>\u21d2<\/mo> I<\/mi>=<\/mo> <\/mi>1000<\/mn><\/mrow>220<\/mn><\/mrow><\/mfrac><\/math> <\/span>\u21d2<\/mo> I\u200b<\/mi>=<\/mo> <\/mi>4<\/mn>.<\/mo>5<\/mn> A<\/mi><\/math> <\/span>So, the rating of fuse wire is <\/span>4<\/mn>.<\/mo>5<\/mn> A<\/mi><\/math>.<\/span>
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