# At what rate is thermal energy generated in the {image} resistor? {applet} - PowerPoint PPT Presentation  Download Presentation At what rate is thermal energy generated in the {image} resistor? {applet}

At what rate is thermal energy generated in the {image} resistor? {applet}
Download Presentation ## At what rate is thermal energy generated in the {image} resistor? {applet}

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1. At what rate is thermal energy generated in the {image} resistor? {applet} • 23 W • 54 W • 49 W • 97 W • 58 W

2. What is the current in the {image} resistor? {applet} • 0.48 A • 0.68 A • 2.1 A • 1.8 A • 4.5 A

3. At what rate is thermal energy generated in the {image} resistor when {image} {applet} • 6.8 W • 28 W • 32 W • 60 W • 7.5 W

4. Determine {image} when {image} and {image} {image} • 36 V • 79 V • 14 V • 46 V • 7.0 V

5. 1. 2. 3. 4. 5. Determine {image} when {image} and {image} {image} • {image} • {image} • {image} • {image} • {image}

6. Determine the current in the 13-V emf. {applet} • 2.5 A • 2.6 A • 2.7 A • 4.5 A • 0.80 A

7. What is the magnitude of the current in the {image} resistor? {applet} • 0.33 A • 0.77 A • 0.41 A • 1.30 A • 0.00 A

8. What is the potential difference {image} shown in the circuit below? {applet} • -5.6 V • 5.6 V • 18 V • -18 V • -3.2 V

9. If {image} at what rate is that emf providing energy to the circuit shown below? {applet} • 1.7 W • 5.7 W • 6.0 W • 2.5 W • 10 W

10. 1. 2. 3. 4. 5. Determine the resistance {image} when {image} {applet} • {image} • {image} • {image} • {image} • {image}

11. What is the potential difference {image} when {image} in the circuit segment below? {applet} • -12 V • +12 V • +60 V • -60 V • +9.0 V

12. If {image} {image} {image} {image} and {image} what is the potential difference {image} {image} • -6.0 V • 6.0 V • -18 V • +25 V • +7.0 V

13. If {image} {image} {image} {image} {image} {image} and {image} what is the potential difference {image} {image} • +41 V • -41 V • -5.0 V • +5.0 V • -33 V

14. If {image} {image} {image} {image} and {image} what is the potential difference {image} {image} • +1.0 V • +7.0 V • -8.0 V • +14 V • -21 V

15. If {image} in the circuit segment shown below, what is the potential difference {image} {applet} • 19 V • 13 V • 44 V • 30 V • 12 V

16. Determine the potential difference, {image} in the circuit segment shown below when {image} and {image} {applet} • -32 V • +32 V • +18 V • -18 V • -59 V

17. If {image} and {image} in the circuit segment shown below, determine the potential difference, {image} {applet} • -83 V • +83 V • +61 V • +33 V • -43 V

18. In an {image} circuit, what fraction of the final energy is stored in an initially uncharged capacitor after it has been charging for 3.7 time constants? • 0.95 • 0.51 • 0.64 • 0.80 • 0.04

19. How long will it take a charged {image} capacitor to lose 28% of its initial energy when it is allowed to discharge through a {image} resistor? • 0.43 ms • 0.78 ms • 0.94 ms • 0.14 ms • 0.67 ms

20. At {image} the switch S is closed with the capacitor uncharged. If {image} {image} and {image} how much energy is stored by the capacitor when {image} {image} • 43 mJ • 35 mJ • 25 mJ • 40 mJ • 10 mJ

21. 1. 2. 3. 4. 5. At {image} the switch S is closed with the capacitor uncharged. If {image} {image} and {image} what is the charge on the capacitor when {image} {image} • {image} • {image} • {image} • {image} • {image}

22. 1. 2. 3. 4. 5. What is the equivalent resistance between points {image} and {image} when {image} {applet} • {image} • {image} • {image} • {image} • {image}

23. 1. 2. 3. 4. 5. What is the equivalent resistance between points {image} and {image} when {image} {image} • {image} • {image} • {image} • {image} • {image}

24. If {image} {image} {image} and {image} at what rate is heat being generated in these resistors? {image} • 29 W • 17 W • 25 W • 26 W • 1.9 W

25. A certain brand of hot dog cooker applies a potential difference (120 V) to opposite ends of the hot dog and cooks by means of the joule heat produced. If 58 kJ is needed to cook each hot dog, what current is needed to cook three hot dogs simultaneously in 2.0 min? • 12 A • 3.8 A • 1.6 A • 9.5 A • 17 A

26. A 25-V battery is connected to a {image} resistor and an unknown resistor {image} as shown. The current in the circuit is 0.20 A. How much heat is produced in the {image} resistor in 2.0 min? {applet} • 0.11 kJ • 0.18 kJ • 0.68 kJ • 0.46 kJ • 0.19 kJ

27. 1. 2. 3. 4. 5. What is the equivalent resistance between points {image} and {image} in the figure when {image} {applet} • {image} • {image} • {image} • {image} • {image}

28. Why does the sum of the currents entering a junction equal the sum of the currents leaving a junction in a loop in a closed circuit? • The potential of the nearest battery is the potential at the junction. • There are no transformations of energy from one type to another in a circuit loop. • Capacitors tend to maintain current through them at a constant value. • Current isn't used up before it enters a junction. • Charge is neither created nor destroyed at a junction.

29. What is the algebraic sum of the changes of potential around any closed circuit loop? • zero • maximum • zero only if there are no sources of emf in the loop • maximum if there are no sources of emf in the loop • equal to the sum of the currents in the branches of the loop

30. The circuit below contains 4 light bulbs. The emf is 110 V. Which of the light bulbs are dimmest? {image} • A and D • B and C • B • C • C and D

31. The circuit below contains three light bulbs and a capacitor. The emf {image} At the instant the switch {image} is closed, which of the light bulbs are brightest? {image} • C • B • A • A and B • All three are equally bright.

32. Which two circuits are exactly equivalent? {image} • C and D • B and E • A and D • D and E • B and C

33. The circuit below contains four 40 watt light bulbs. The emf {image} Which of the light bulbs are dimmest? {image} • C and D • A and B • B and C • B • All four are equally dim.

34. Which of the light bulbs are dimmest when the capacitor has half its maximum charge? {image} • C • B • A • A and B • All three are equally dim.

35. The circuit below contains 3 light bulbs and a capacitor. The emf is 110 V. Which of the light bulbs are dimmest? (Assume the capacitor is fully charged.) {image} • C • A and B • A • B • All three are equally dim.

36. The battery is disconnected from a series {image} circuit after the capacitor is fully charged and is replaced by an open switch. What happens when the switch is closed? • The current through the resistor is always greater than the current through the capacitor. • The current through the resistor is always less than the current through the capacitor. • The current through the resistor is always equal to the current through the capacitor. • The capacitor does not allow current to pass. • The current stops in the resistor.

37. In order to maximize the percentage of the power that is delivered from a battery to a device, you want the internal resistance of the battery to be _____. • as low as possible • as high as possible • the percentage does not depend on the internal resistance

38. If a piece of wire is used to connect points {image} and {image} in the figure below, the brightness of bulb {image} _____. {image} • increases • decreases • remains the same