Lil'Wayne

2 identical lightbulbs are in a series next to each other. Find the length of the Tungsten filament (?

2 identical lightbulbs are in a series next to each other. Find the length of the Tungsten filament (resistivity = 5.6e-8 Ohm-meters and diameter = .004 mm) of an individual bulb if the ammeter reads 0.17 amps and the bulbs are dissipating 6 Watts each.

crate fxt guitar amp, short?

I own a crazt fxt65 guitar amp and it decides when it wants to work. when it does work, any hi pitch note will cause it to turn off. i dont know where to start with finding the problem? is there a wiring diagram anywhere? Any potential components i should check? btw i am comfortable with a multimeter so feel free to be technical and supply any info that may help

Peugeot 206 Flat Battery?

Hi, my wife’s car wouldn’t start the other day. I jump started it off my car and tested the battery with a voltmeter whilst the engine was running. I had 14 volts, making me think that it wasn’t an alternator problem. After taking it for a run and switching off the engine, it wouldn’t start again so i went and bought a new fully charged battery. The car then ran fine for three days, but she went to get in it today and found that the battery was flat again.

Does anyone have any suggestions as to what the problem could be?

Thanks.

How to place ammeters and voltmeters in a circuit?

In physics class, we’ve been doing circuits lately using the resistor and battery symbols. Now the teacher wants us to redraw the circuits using ammeter and voltmeter. I understand that ammeters are in-series and voltmeters are parallel, but idk how to draw that in the diagram :/ Can somebody explain or put up an example? Thank you!

Why does the head-unit in my car stereo setup keep turning off?

I’ve installed a stereo setup into my car recently (Nissan Pulsar SSS, SR20DE), which consists of:

Alpine CDE-102E Head Unit
Alpine MRP-F200 4 Channel Amplifier
Alpine MRP-M500 Monoblock Amplifier
Kenwood KFC-W3010 Subwoofer
Alpine SPR-17C Co-Axial Speakers (4 of them)

I’m running 4 gauge wire from the battery to a splitter that makes 4 connections of 8 gauge wire. Both amplifiers are powered by separate 8 gauge wires and are well-ventilated in a custom install.

The head-unit has been installed using wire harness connectors. One harness connector houses all the factory speaker wires (which has been disconnected now due to using the RCA Cables; left/right “Front” connections for the 4 Coaxial Speakers, left/right “Rear” connections for the Subwoofer). The other harness connector houses the power, ground, ignition, mute, remote, and illumination wires. The connections have been double-checked with a multi-meter to test for resistance across a wire/connection and have all come up with very low resistance.

Everything worked fine before the amplifiers were installed, but now the head-unit turns off and then on again randomly. I thought this might have been a battery/alternator issue, but I tested them with the multimeter and got 12.75 volts when the car was off (left for 12 hours), and 14.14 volts when the car was running, which is fine. The amplifiers are earthed at the same bolt in the boot of the car, I don’t know if this is an issue.

Possible Causes:
- Shorting out somewhere
- An earthing point isn’t sufficient enough to be an earthing point
- Battery/Alternator needs replacing
- Gain on the amplifiers hasn’t been set properly (I don’t know much about gain on amplifiers)
- Something is causing to head unit to turn off as a safety precaution
- Power is being cut to the head unit
- Ignition is being cut to the head unit

Notes:

I’ve noticed that my saved Radio preferences have not been lost, suggesting that power is not being cut. The headlights do not dim, and no other electronics in the car have ever hesitated when the music was playing, suggesting that it is not a low battery issue. The head-units battery and ignition connection runs from the factory wiring, but the amplifiers power and wires are aftermarket installs that run through a fuse in engine bay, if the problem was isolated to the amplifiers it wouldn’t cause the head-unit to turn off. Any speakers could be out of phase, as I have not thoroughly checked them.

Are there any tests I can do to work out where the problem is coming from? (I have a multi-meter)
Any solutions to the problem?

Any help on the matter is greatly appreciated.

A very long insulating cylinder of charge?

A very long insulating cylinder of charge of radius 2.60 cm carries a uniform linear density of 14.0 nC/m.
If you put one probe of a voltmeter at the surface, how far from the surface must the other probe be placed so that the voltmeter reads 190 V?

Help!! With Electric questions?

1.Voltage is generated by corroding two elements with different ionization potentials (True or False)
2.Your digital multimeter can be used to measure small levels of current in series with resistor, but will burn out the shunt if connected directly across the power supply. (True or False)
3.State Ohm’s Law?
4.Write the equation for electrical power?

Just need help with these four im kind of stumped.

Physics II problem. . Find the Resistance, volt, current, and emf.?

physics problem!

1. Two resistors of 4 ohms and an unkn0wn resistance R are connected in series to a cell. The voltmeter reading in the unkn0wn resistor is 2.5 volts, the ammeter reading being 1.25 amp. What is the resistance of the unkn0wn one? What is the voltmeter reading in the 4 ohm resistor?

2. A 2 ohm resistor and a 5 ohn resistor are c0nnected in parallel. The group is connected in series to a 10 ohm resistor. The combinati0n is c0nnected to a 24 volt series.
Find:
a. The total resistance
b. The total current
c. The curreng in the 5 ohm resistor

3. A rheostat and an ammeter are connected in series to a battery of 0.2 ohm internal resistance. When the rheostat is adjusted to 10 ohms, the ammeter reads 5 amperes. The ammeter reading dr0ps to 3 amperes, when the rheostat is adjusted to 18ohms. What is the emf of the battery?

my circuit board has alot of disc capacitors but the all give diffrent readings?

On the pcb im looking at there is several 200K disc capacitors, but when i put the multimeter on the legs of each one i get diffrent readings from 1-140K… does that mean theyre ALL defective??.
There is three on the bridge rectifier and only two i get a reading the other i get nothing.
Ive tested the power on the board and i have 24volts AC, but zero once rectified, yet ive tested the diodes and theyre fine

I am totally lost, please help me, plzzzzzzzzzzzzz?

I am a CBSE class 12 student…I have a chemistry experiment,

To set up a simple voltaic cell (daniell cell) & measure its emf.

I need to write down the observations….

Concentration of solution voltmeter reading after

1 M ZnSO4 0 mins. five mins. 10 mins. fifteen mins 20 mins
& 1M CuSO4

Please provide me the data….it does not matter whether it is experimented or not…..just a satisfactory data.