Table of contents

0. Math Review31m
- Math Review
  31m
1. Intro to Physics Units1h 29m
2. 1D Motion / Kinematics3h 56m
3. Vectors2h 43m
4. 2D Kinematics1h 42m
5. Projectile Motion3h 6m
6. Intro to Forces (Dynamics)3h 22m
7. Friction, Inclines, Systems2h 44m
8. Centripetal Forces & Gravitation7h 26m
9. Work & Energy1h 59m
10. Conservation of Energy2h 54m
11. Momentum & Impulse3h 40m
12. Rotational Kinematics2h 59m
13. Rotational Inertia & Energy7h 4m
14. Torque & Rotational Dynamics2h 5m
15. Rotational Equilibrium3h 39m
16. Angular Momentum3h 6m
17. Periodic Motion2h 9m
18. Waves & Sound3h 40m
19. Fluid Mechanics4h 27m
20. Heat and Temperature3h 7m
21. Kinetic Theory of Ideal Gases1h 50m
22. The First Law of Thermodynamics1h 26m
23. The Second Law of Thermodynamics3h 11m
24. Electric Force & Field; Gauss' Law3h 42m
25. Electric Potential1h 51m
26. Capacitors & Dielectrics2h 2m
27. Resistors & DC Circuits3h 8m
28. Magnetic Fields and Forces2h 23m
29. Sources of Magnetic Field2h 30m
30. Induction and Inductance3h 38m
31. Alternating Current2h 37m
32. Electromagnetic Waves2h 14m
33. Geometric Optics2h 57m
34. Wave Optics1h 15m
35. Special Relativity2h 10m

27. Resistors & DC Circuits

Solving Resistor Circuits

Physics

27. Resistors & DC Circuits

Solving Resistor Circuits

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Multiple Choice

The five identical lightbulbs in the figure are all glowing. What change in brightness will occur if bulb S is unscrewed and removed from the circuit?

Bulbs T, P, Q, and R will all get brighter.

Bulbs T, P, Q, and R will all get dimmer.

Bulb T will go out. Bulbs P, Q, and R will get brighter.

Bulb T will go out. Bulbs P, Q, and R will get dimmer.

Bulbs T, P, Q, and R will all continue to glow with the same brightness.

Bulb T will go out. Bulbs P, Q, and R will continue to glow with the same brightness.

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Verified step by step guidance

Identify the configuration of the circuit: The circuit is a combination of series and parallel connections. Bulbs P, Q, and R are in parallel with each other, and this parallel group is in series with bulbs S and T.

Understand the effect of removing a bulb in series: When a bulb in series (like bulb S) is removed, it breaks the circuit, stopping the current flow through that path.

Analyze the impact on bulb T: Since bulb T is in series with bulb S, removing bulb S will cause bulb T to go out because the circuit path is interrupted.

Consider the parallel section: Bulbs P, Q, and R are in parallel with each other and are not directly affected by the removal of bulb S, as they have their own separate path to the power source.

Conclude the effect on brightness: Bulbs P, Q, and R will continue to glow with the same brightness because their parallel circuit remains intact, while bulb T will go out due to the open circuit caused by removing bulb S.