{"id":248224,"date":"2022-09-10T09:35:13","date_gmt":"2022-09-10T04:05:13","guid":{"rendered":"https:\/\/infinitylearn.com\/surge\/question\/a-drop-of-10-6-kg-water-carries-10-6-c-charge-what-electric-field-should-be-applied-to-balance-its-weight-assume-g-10-ms-2\/"},"modified":"2022-09-10T09:35:13","modified_gmt":"2022-09-10T04:05:13","slug":"a-drop-of-10-6-kg-water-carries-10-6-c-charge-what-electric-field-should-be-applied-to-balance-its-weight-assume-g-10-ms-2","status":"publish","type":"questions","link":"https:\/\/infinitylearn.com\/surge\/question\/physics\/a-drop-of-10-6-kg-water-carries-10-6-c-charge-what-electric\/","title":{"rendered":"A drop of 10-6 kg water carries 10-6 C charge. What electric field should be applied to balance its weight? (assume, g = 10 ms-2)"},"content":{"rendered":"","protected":false},"author":1,"template":"","meta":{"_yoast_wpseo_focuskw":"","_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"A drop of 10-6 kg water carries 10-6 C charge. What electric field should be applied to balance its weight? (assume, g = 10 ms-2)","custom_permalink":"question\/physics\/a-drop-of-10-6-kg-water-carries-10-6-c-charge-what-electric\/"},"categories":[],"acf":{"question":"<p>A drop of 10<sup>-6<\/sup> kg water carries 10<sup>-6<\/sup> C charge. What electric field should be applied to balance its weight? (assume, <i>g<\/i> = 10 ms<sup>-2<\/sup>)<\/p>","options":[{"option":"<p>10 V\/m, upward<\/p>","correct":true},{"option":"<p>10 V\/m, downward<\/p>","correct":false},{"option":"<p>0.1 V\/m, downward<\/p>","correct":false},{"option":"<p>0.1 V \/m, upward<\/p>","correct":false}],"solution":"<p>By using, <i>QE<\/i> = <i>mg<\/i><\/p><p><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><mo>\u21d2<\/mo><mi>E<\/mi><mo>=<\/mo><mfrac><mrow><mi>m<\/mi><mi>g<\/mi><\/mrow><mi>Q<\/mi><\/mfrac><mo>=<\/mo><mfrac><mrow><msup><mn>10<\/mn><mrow><mo>-<\/mo><mn>6<\/mn><\/mrow><\/msup><mo>\u00d7<\/mo><mn>10<\/mn><\/mrow><msup><mn>10<\/mn><mrow><mo>-<\/mo><mn>6<\/mn><\/mrow><\/msup><\/mfrac><mo>=<\/mo><mn>10<\/mn><mo>&nbsp;<\/mo><mi mathvariant=\"normal\">V<\/mi><mo>\/<\/mo><mi mathvariant=\"normal\">m<\/mi><mo>,<\/mo><mtext>&nbsp;upward because&nbsp;<\/mtext><\/math>charge is positive.<\/p>","subject":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>A drop of 10-6 kg water carries 10-6 C charge. 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