Alternating current Definition and 121 Threads

Homework Statement How does a loop of wire in a generator produce alternating current? a.by creating current by rotating in an existing magnetic field? b.by creating a varying magnetic field with its rotational kinetic energy c.by rotating through areas of high and low electrical force...

a.by creating current by rotating in an existing magnetic field? b.by creating a varying magnetic field with its rotational kinetic energy c.by rotating through areas of high and low electrical force An electric field produces a magnetic field even when there is no wire to conduct a...

Can someone please pore some light on the entitled topic. Assume that i path an AC current through conductor. Dose it produces Hall effect? furthermore, assume that the conductor is non-symmetric, namely it is coating with another conducting thin film layer. Now is there any frequency under...

i am currently going over ac and dc currents in school but i want to know more but my teacher isn't going very deep into this subject. Can you help me out please?

Homework Statement A light bulb has a resistance of 212 . It is connected to a standard wall socket (120 V, 60.0 Hz). (a) Determine the current in the bulb. (b) Determine the current in the bulb after a 13.2-μF capacitor is added in series in the circuit. Homework Equations R, V, f are...

Take the case of a lamp bulb. When applied an Alternating current across it.. it basically goes on and off 50 times in a second [in India atleast.. we get 50Hz]. Now, it means that the filament gets hold and cold continuously. From wikipedia: so.. is alternating current more damaging for...

Homework Statement Q] The figure below shows a typical circuit for a low-pass filter. An AC input V_i~=~10~mV is applied at the left end and the output V_o is received at the right end. Find the output voltage as a function of \nu~(\textrm{frequency})...

Homework Statement A light bulb is connected to a 120.0-V wall socket. The current in the bulb depends on the time t according to the relation I = (0.669 A) sin [(491 Hz)t]. What is the frequency of the alternating current? Homework Equations How do I use the given value for I...

My Question is this- We get AC supply to our houses, So for the first half cycle the current should from thro the live wire to the load and then return thro neutral, Now for the 2nd half cycle this must be reveresed, That is Neutral-load-Phase. This is wat is Alternating current. But I...

Hey all, any help with any of these problems would be greatly appreciated, I have attempted all but one(because I do not even know where to start). Homework Statement A 58.0 resistor, a 3.00 µF capacitor, and a 0.400 H inductor are connected in series to a 77.0 V (rms), 60.0 Hz source. (a)...

Im new to electronics and the whole concept of AC current is making my brain hurt. From what I've gathered AC current unlike DC moves back and forth. The electrons don't just flow straight around the circuit but theyre constantly moving back and forth. When it comes to Hertz and...

In an LR circuit with alternating current , it is know that the inductance of the cable is of the order 10^-7 . With a 2 ohm resistor ,the circuit is used to measure inductance.There are 2 frequencies , 100kHZ and 1M Hz,that can be chosen for the measurement . So whyI MHz is better . I know...

Since the question quite long and contains many formulas, so i take a photo instead. my question is that for part b since Z= \sqrt{R^2+(X_L-X_C)^2} can i subst X_L = (W_0+\triangle{\omega})L and X_C = \frac{1}{(w_0+\triangle{\omega})L} into the Z= \sqrt{R^2+(X_L-X_C)^2}...

Hi, When you have a high frequency high power alternating current, Can you use a regular wire to transmit the current or do you have to use a waveguide? Or some kind of combination? Thanks.

Can someone explain breifly or in detail :biggrin: the differnece between ac and dc. Maybe advantages and disadvantages. From what i have researched i know that ac the current flows in every direction while in dc it only flows in one. In ac the voltage can be put down and up using transformers...

When the generator produces electricity,during the revolutions of the coil,the voltage induced is changing.If the voltage supply of a certain country is 110V, will the voltage supplied is NOT 110V sometimes? Also, the current induced when the coil is set vertically,will the appliance stop...

alternating current wave prob... assume the wave is sinusoidal. suppose that each horizontal division (13) represents 1.0 ns and that each vertical division (11) represents 1 mV. what is the approx. rms voltage? please help me solve this. i am not so sure how to find rms, and if you do...

When an a.c. flows in a resistor,the mean power dissipated is P.If the frequency of the a.c. is doubled with the same value of peak voltage,what id the average power dissipated now ? My solution : P = (I_rms)^2 R I assume that as the peak voltage remains the same and the mean power...

Two connections allow contact with two circuit elements in series inside a box, but it is not known whether the circuit elements are R,L, or C. In an attempt to find what is inside the box, you make some measurements with the following results. When a 3.0-V dc power supply is connected across...

Just wanted to know if someone could help me out or check my answers. The Transformer 38) A step-down transformer is used for recharging the batteries of portable devices such as tape players. The turns ratio inside the transformer is 13:1 and it is used with 120V (rms) household service. If...

What is alternating current?