The heat produced in a 5 Ω resistor carrying a steady current of 2 A for 10 s is:
A200 J
B100 J
C1000 J
D20 J
Answer & Solution
Correct answer: A. 200 J
Joule heating H = I²Rt = 2²×5×10 = 200 J.
Related questions
For a battery of emf ε and internal resistance r driving current I through external resistA galvanometer of resistance G is converted into a voltmeter reading full-scale voltage V A galvanometer of resistance G shows full-scale deflection at current I_g. To convert it iThe relation between current density j, drift velocity v_d, number density n and charge e A wire has a resistance R. It is stretched uniformly so that its length becomes 2L. The neKirchhoff current law at a junction is a statement ofTwo cells of emf ε and internal resistance r each are connected in parallel. The equivalenA potentiometer of length L is used to compare emfs. If the balance lengths for cells of e