Q. Consider four circuits shown in figure. In which circuit power dissipated is greatest. (Neglect the internal resistance of the power supply)
A) [image:3_image90.emf]
B) [image:3_image91.emf]
C) [image:3_image92.emf]
D) [image:3_image93.emf]
Explanation
(a) Power dissipated $P = \frac{V^{2}}{R_{eff}};$
$R_{eff}$ is least in case of figure (a). Hence power dissipated in circuit (a) is maximum
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.