Chapter 31 Electromagnetic Oscillations and Alternating Current In
- Slides: 31
Chapter 31 Electromagnetic Oscillations and Alternating Current In this chapter we will cover the following topics: -Electromagnetic oscillations in an LC circuit -Alternating current (AC) circuits with capacitors -Resonance in RCL circuits -Power in AC-circuits -Transformers, AC power transmission (31 - 1)
Suppose this page is perpendicular to a uniform magnetic field and the magnetic flux through it is 5 Wb. If the page is turned by 30◦ around an edge the flux through it will be: A. 2. 5 Wb B. 4. 3 Wb C. 5 Wb D. 5. 8 Wb E. 10 Wb
A car travels northward at 75 km/h along a straight road in a region where Earth’s magnetic field has a vertical component of 0. 50 × 10− 4 T. The emf induced between the left and right side, separated by 1. 7 m, is: A. 0 B. 1. 8 m. V C. 3. 6 m. V D. 6. 4 m. V E. 13 m. V
L C (31 - 2)
L C (31 - 3)
L C (31 - 4)
1 3 7 5 2 4 6 8 (31 - 5)
(31 - 6)
(31 - 7)
(31 - 8)
L C (31 - 9)
(31 - 10)
(31 - 11)
(31 - 12)
O (31 - 13)
(31 - 14)
O (31 - 15)
(31 - 16)
SUMMARY Circuit element Average Power Reactance Phase of current Resistor R Current is in phase with the voltage Capacitor Current leads voltage by a quarter of a period C Inductor L Voltage amplitude Current lags behind voltage by a quarter of a period (31 - 17)
(31 - 18)
A B O (31 - 19)
(31 - 20) A B O
(31 - 21)
(31 - 22)
(31 - 23)
Transmission lines Erms =735 k. V , I rms = 500 A Step-down Step-up transformer T 1 Power Station (31 - 24) home transformer 110 V R = 220Ω T 2
(31 - 25)
(31 - 26)
(31 - 27)
Hitt A generator supplies 100 V to the primary coil of a transformer. The primary has 50 turns and the secondary has 500 turns. The secondary voltage is: A. 1000 V B. 500 V C. 250 V D. 100 V E. 10 V
hitt The main reason that alternating current replaced direct current for general use is: A. ac generators do not need slip rings B. ac voltages may be conveniently transformed C. electric clocks do not work on dc D. a given ac current does not heat a power line as much as the same dc current E. ac minimizes magnetic effects
- Electromagnetic oscillations and alternating current
- Electromagnetic oscillations and alternating current
- Alternating current circuits and electromagnetic waves
- Chapter 7 alternating current
- Alternating current practice problems
- Ac current graph
- Alternating current ppt
- A psu converts alternating current to what
- Dividing phasors
- Alternating current
- Elasticity and oscillations
- Baryon acoustic oscillations
- Joint play definition
- Universe expanding faster than should be
- Baryon acoustic oscillations
- Baryon acoustic oscillations
- Baryonic acoustic oscillations
- Tanya leise amherst
- Slow oscillations
- Coupled oscillations
- Drude free electron theory
- Plasma oscillations
- Lotka-volterra predator-prey model
- Line current and phase current
- Power formula three phase
- Drift current and diffusion current in semiconductor
- Ac theory 3 lesson 4
- Drift current
- Drift current and diffusion current
- Line current and phase current
- Infineon
- Diffusion current density