A resistor develops 300 J of thermal energy in 15s, when a current of 2 A is passed through it. If the current increases to 3 A, the energy developed in 10s is……………..J.
<p> <math><mrow><mi>H</mi><mo>=</mo><msup><mrow><mi>I</mi></mrow><mrow><mn>2</mn></mrow></msup><mi>R</mi><mi>t</mi><mo>=</mo><msup><mrow><mn>2</mn></mrow><mrow><mn>2</mn></mrow></msup><mo>×</mo><mi>R</mi><mo>×</mo><mn>1</mn><mn>5</mn></mrow></math></p><p><math><mrow><mo>⇒</mo><mn>3</mn><mn>0</mn><mn>0</mn><mo>=</mo><mn>6</mn><mn>0</mn><mi>R</mi></mrow></math></p><p><math><mrow><mi>R</mi><mo>=</mo><mn>5</mn><mi>Ω</mi></mrow></math></p><p>Now for 3A, time = 10 sec</p><p><math><mrow><mi>H</mi><mo>'</mo><mo>=</mo><msup><mrow><mi>l</mi></mrow><mrow><mn>2</mn></mrow></msup><mi>R</mi><mi>t</mi><mo>=</mo><msup><mrow><mn>3</mn></mrow><mrow><mn>2</mn></mrow></msup><mo>×</mo><mn>5</mn><mo>×</mo><mn>1</mn><mn>0</mn><mo>=</mo><mn>4</mn><mn>5</mn><mn>0</mn><mi>J</mi></mrow></math></p>
This website uses Cookies and related technologies for the site to function correctly and securely, improve & personalise your browsing experience, analyse traffic, and support our marketing efforts and serve the Core Purpose. By continuing to browse the site, you agree to Privacy Policy and Cookie Policy.
