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

Kirchhoff's Junction Rule

Physics

27. Resistors & DC Circuits

Kirchhoff's Junction Rule

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Multiple Choice

Which of the following statements is correct?

Ammeters and voltmeters should always be connected to a circuit in parallel with the element being measured.

Ammeters and voltmeters should always be connected to a circuit in series with the element being measured.

Ammeters should always be connected in parallel with other elements; voltmeters should be connected in series.

Ammeters and voltmeters can be wired however you like, without substantially changing the circuit.

Ammeters should always be connected in series with other elements; voltmeters should be connected in parallel.

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Verified step by step guidance

Understand the function of an ammeter: An ammeter is used to measure the current flowing through a circuit. To accurately measure the current, it must be connected in series with the circuit element. This ensures that the entire current flows through the ammeter.

Understand the function of a voltmeter: A voltmeter is used to measure the potential difference (voltage) across a circuit element. To measure this correctly, it must be connected in parallel with the element. This allows the voltmeter to measure the voltage drop across the element without altering the current flowing through it.

Consider the impact of incorrect connections: If an ammeter is connected in parallel, it could create a short circuit due to its low internal resistance, potentially damaging the circuit. Conversely, if a voltmeter is connected in series, it would significantly alter the circuit's resistance due to its high internal resistance, affecting the current flow.

Evaluate the given statements: Analyze each statement based on the understanding of how ammeters and voltmeters should be connected. The correct statement should reflect the proper connection methods for both devices.

Identify the correct statement: Based on the analysis, the correct statement is that ammeters should always be connected in series with other elements, and voltmeters should be connected in parallel. This ensures accurate measurements without altering the circuit's behavior.