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Recent Resistor questions

How do I test how many amps a transformer actually puts out?

How do I test how many amps a transformer actually puts out?I need to validate the 200 mA @ 24 VAC claim on a Transformer. I have some resistors but I don't know how to proceed with the wiring. I'm an ME so my electrical knowledge is very limited. Help anyone?

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Mike G.

Master Electrician

Vocational, Technical or Trade Scho

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I have a series-parallel circuit. Resistor 1 is 100

I have a series-parallel circuit. Resistor 1 is 100 ohm's and resistor 2 is 250 ohm's. Resistor's 1 and 2 are apart of . In another series is resistors 3 and 4, with resistor 3 being 350 ohm's and resistor 4 being 200 ohm's. What would the total resistance and total current be? This is the last question, thanks again.

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Kevin

Supervising Electrician

Diploma

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Two resistors color coded,, black, and silver are connected

Two resistors color coded brown, green, black, and silver are connected in series to a 9V source. What are the highest and lowest values of resistance given the color code, and what is the maximum current that could be drawn from the source?

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Kevin

Supervising Electrician

Diploma

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12v inverter question Do inverters use power when there is

12v inverter questionDo inverters use power when there is no load on the 12v supply?Since they are based on windings and current, is there still current flowing on the 120v winding when little is being drawn on the 12v supply?I have a heavy duty 110amp inverter for charging a tray of deep cycle batteries, but I have a use for a smaller 10 amp inverter I'm thinking of using it for. it will be running on a generator, so i don't want to pull more than needed off the genny and tryiong to figure out if I should use the heavy duty or just buy a smaller inverter.

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Kevin

Supervising Electrician

Diploma

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I have a workshop which requires a DC Voltage output of 12V.

i have a workshop which requires a DC Voltage output of 12V. i have a 36volt DC source available and the following resistors 1kohm, 4kohm and another 4kohm. how do idesign a circuit from the following to provide the correct output voltage

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Kevin

Supervising Electrician

Diploma

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4,126 satisfied customers
I am re-wiring a small air pump. The wire that goes from the

I am re-wiring a small air pump. The wire that goes from the pump to the on/off switch has a small resistor attached to the wire where it connects to the switch. Only one lead on the resistor is attached, the other lead has been snipped off. The resistor is a very small one, five band, brown- orange-black-gold-brown. The best I can tell it is a 13Ohm 1% rating.What is the purpose of this resistors?Thank you for your help.

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Steve G.

Chief Engineer

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Are there metals (alloys?) that have a minimum threshold before

are there metals (alloys?) that have a minimum threshold before they will conduct electricity? As in, there needs to be a minimum voltage/current that goes through it before it stops acting as a resistor. My electrical knowledge is lacking, sorry in advance for layman's ignorance.

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Kevin

Supervising Electrician

Diploma

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We had undercounter lights installed 8 years ago in custom

We had undercounter lights installed 8 years ago in custom home. The ballast burned up in one 3 xenon bulb fixture and when installed a new ballast (identical to old one), the dimmer switch will only allow the bright setting. No dimming as other threefixtures. Therefore, we think the rocker switch is bad. Cannot find a replacement rocker switch, so we are looking for new fixture. It is a Jasco brand, but they say it is not made anymore. I did install a LED fixture and the lighting is so different and toobright even though it is set on low. What xenon puck fixture can you recommend. I only need three to hard wire in place, but I want something to blend or be very close to the emitted light of the other three old fixtures. All fixtures are wired such that onewall switch turns them on. I understand certain puck lights can get very hot and I want something that will not get so hot you cannot hold your hand to it. I will settle for another 3 bulb fixture in place of the three pucks if you can find something. Canyou help/suggest several options for me? Thanks.

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AssuredElectrical

Electrical Contractor

High School or GED

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I'm helping my father in-law with some wiring of new LED lights,

I'm helping my father in-law with some wiring of new LED lights, but he's got a bit of a dilemma with the power supply he's got. Here's the basics, he has 3 LED lights he wants to wire in parallel, they're each 24volt 300ma. If I'm not mistaken, we'll then need to power it with a 24volt 1amp source. The power supply he has for it as a 12volt 5amp. What type of a transformer would we need, and would we also need to have some resistors inline to drop the amperage? Thank you

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AssuredElectrical

Electrical Contractor

High School or GED

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4,182 satisfied customers
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