Page 322 - Schaum's Outline of Theory and Problems of Applied Physics

CHAP. 25] DIRECT-CURRENTCIRCUITS 307

25.3. (a) 15 (b) 0.2 A

25.4. 0.67 ;1 ;2 ;3 ;4 ;6

25.5. (a) 0.133 A; 0.133 A (b) 1.78 W; 3.55 W
25.6. (a) 0.4 A; 0.2 A (b) 16W;8W

25.7. 250

25.8. The 5- resistor will carry a current three times greater than that carried by the 15- resistor.
25.9. (a) 28.8 V across the 40- resistor; 43.2 V across the 60- resistor.
(b) 0.72 A in each resistor.

25.10. (a) The equivalent resistance is 17.4 .
(b) The current in the 5- and 10- resistors is 1.15 A; in the three 0.2- resistors, 0.46 A; and in the 4- resistor,
0.69 A.

25.11. (a) The equivalent resistance is 4.90 .
(b) The current in the 20- resistor is 2.63 A; in the 10- resistor, 5.26 A; in the 6- resistor, 7.89 A; and in the
8- resistor, 12.50 A.

25.12. (a) The equivalent resistance is 5.167 .
(b) The current in each 5- resistor is 0.581 A; in the 8- resistor, 0.387 A; and in the 4- resistor, 0.774 A.

25.13. 0.494 A

25.14. (a) 19 A (b) 0.3 A

25.15. 12.4 V
25.16. (a) 0.9 (b) 22 V

25.17. 22.3 A

25.18. 34.3 A
25.19. (a) 0.4 (b) 11 kW (c) 1 kW

25.20. 3.7

25.21. The current in the 5- resistor is 0.286 A to the left, the current in the 10- resistor is 0.143 A to the left, and the
current in the 6- resistor is 0.429 A to the right.

25.22. The current in the 10- resistor is 0.935 A to the left, and the currents in the 3- and 5- resistors are both 0.785 A
to the left.

25.23. The current in the 8- resistor is 0.22 A to the left, the current in the 4- resistor is 1.05 A to the right, and the
current in the 7- resistor is 0.83 A to the left.

25.24. The current in the 10- resistor is 0.857 A to the left, the current in the 5- resistor is 1.486 A to the right, and the
current in the 20- resistor is 0.629 A to the left.

25.25. (a) 0.475 A to the right (b) 7.85 V