AP EAMCET2012PhysicsCurrent Electricity
Three resistances of equal values are arranged in four different configurations as shown below. Power dissipation in the increasing order is
Options
- A(III) < (II) < (IV) < (I)
- B(II) < (III) < (IV) < (I)
- C(I) < (IV) < (III) < (II)
- D(I) < (III) < (II) < (IV)
Correct answer
A. (III) < (II) < (IV) < (I)
Step-by-step solution
For figure I, aligned Total resistance & =3 R I power & =I^2(3 R) aligned For figure II, aligned Resistance & = 2 R 3 II power & =I^2 ( 2 R 3 ) aligned For figure III, aligned Total resistance & = R 3 III power & =I^2 ( R 3 ) aligned For figure IV, Total resistance 3 2 IV power =I^2 ( 3 2 R ) Hence, option (a) is correct.