Two bulbs rated 100 W and 60 W are designed for the same supply voltage. Compared with the 60 W bulb, the 100 W bulb has:
Aa higher resistance
Bzero resistance
Cthe same resistance
Da lower resistance
Answer & Solution
Correct answer: D. a lower resistance
At a fixed voltage P = V²/R, so the higher-power (100 W) bulb must have the lower resistance.
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