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Does a multimeter give lower readings when the battery charge is low?
Wiki User
∙ 14y ago
Yes
Wiki User
∙ 14y ago
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How To Measure Electrical Resistance?
If you put a current of 1 amp through a resistor, the voltage across it is equal to the resistance in ohms. This can also be done with lower currents and then the result must be multiplied up in the right ratio. An ohmmeter, or the ohm scale on a multimeter, uses a battery to supply the current.
Where is the starter motor on a 2002 Subaru Forester?
Look at the rear lower section of engineFollow the + battery cable
Why voltage measured at terminals of battery to which load is connected is always lower than open circuit voltage?
Real-world batteries do not have zero internal resistance. When one connects a load (resistance) to a battery, current begins to flow and the open-circuit potential is divided between the battery's internal resistance and the resistance of the load. Thus, one will measure a lower voltage at the battery terminals when a load is connected, compared to no-load conditions.
A red resistor draws more current than a blue resistor when they are connected to the same battery which resistor has the lower resistance?
The voltage of a battery goes as the current times the resistance (V=IR). Because the voltage is being held constant, the resistor that draws the most current will have the lower resistance.
What does Wh and mAH mean on a battery?
The battery can supply an amount of electric charge measured in milliampere-hours, which expresses its capacity to supply a load of a number of milliamps for a number of hours. The idea is that if the load current is high, the battery lasts for less time, so the current times the time makes good measure of the capacity. It is also common practice to measure larger batteries in amp-hours, and there are 1000 mAH in one AH. This measure is a nominal one because in practice a high current load will give a lower AH capacity than when the load is small. Multiplying the voltage by the AH capacity gives the watt-hour capacity, which measures how much energy the battery can supply. This measures is also only a nominal only because as the battery runs down its voltage reduces.
What amp do you charge ATV battery?
you charge a atv battery at 2 amps or lower
When you make a lemon battery does the amount of electricity change from how deep you put the zinc screw in?
The multimeter(if you are using one) would show a lower voltage.
Can you use a different brand charger with a lower voltage and a hr?
Lower voltage, no, lower amps, yes. I will just take longer to charge the battery.
How do you check a broken electrical connection on a battery cable?
Set a multimeter to continuity. Put the leads of the meter at either end of the wire you are checking. The lower the value the better. It should read well under 100 for a battery cable.
Can you charge a dead car battery on a battery charger?
Yes, you can even charge it on the vehicle. Make sure you charge it slowly and either use an automatic shutoff charger or pay close attention the the charge. Do not overcharge. It is best to charge it slowly with a 10 amp or lower charger. Make sure the battery cables are clean and tight.
Ford Ranger battery appears to be dead tried a battery charger and lights came on but clicking sound when I try to start it?
Check the level of the electrolyte (water) in the battery if possible. If it is near full, then reconnect the battery charger and charge it at the 2 AMP rate. This is known as a "trickle" charge. Your charger may have the 6 amp charge rate also. The amp meter on the charger will indicate a lower and lower reading as the battery is charging and accepts the charge. An Auto Zone can "load test" your battery for free if you can get it to one of their stores. Your battery sounds weak and needs a good charge (be patient...it takes time) or needs replacing.
Is it bad to charge your ipod everyday even if it still had battery?
It can wear down the battery and decrease over overall life of the battery. Just charging it until it it's fully powered can help to keep the battery life as high as possible. Make sure you do not overcharge the battery and lower it's lifespan per charge.
Can 5v charger charge a 7.5v battery?
yes it just takes longer to charge, but check how much Amps (A) your charger gives out and how much Amps your battery can take if the battery has lower Amperage (A), don't do it, otherwise you're fine. <<>> No, the charging unit has to have a higher output that the battery voltage that it is charging. For example, on a 12 volt car battery the charging rate is 13.5 volts.
Do you need to charge a brand new motorcycle battery?
One view: Some batteries come with a charge which may or not start the motorcycle. I have seen batteries come that are not topped off with acid, but the acid is sent in a separate container that you need to pour in. I would say in most cases that you need to charge or jump the new battery. Take it for a 10 minute ride and you should be good to go. Alternate view: When you put the acid in the battery it does charge itself somewhat, but not fully (perhaps only 75%). That is why it says to charge it, follow the instructions with the battery! When you charge it fully it makes the battery last longer. To charge the battery, you have to buy a battery charger and you need one that will only charge at 2 amps. A "smart" battery "tender" may not work as it may register the battery as fully charged. You need to use a simple (non computerized) 1-2 amp trickle charger. There are rules about the max rates to trickle charge, I've seen 10% of rated cold cranking amps (CCA). Lower amperage will be safer but take longer to charge.
Will my laptop charge if I replace it's 28V adapter with a 20V adapter even though the Voltage is lower?
No, you should always match the voltage requirements. Not only will your battery not charge you could actually damage it.
What is normal voltage for automobile battery?
A fully charged battery will read 12.6 volts with the engine not running. It will read 12.4 at 75% charge, 12.2 at 50% charge, and 12 volts at 25% charge. With the engine running at idle you should read 13.5 to 15.5 volts. Any lower or higher and the alternator may be defective.
How do I fix my PS4 controller if it won't charge?
Did you ever plug the controller into a charger that was plugged into a wall? if so then you probably fried the battery since the charge put out of the ps4 is lower than that of a phone charger and the battery can't handle it. I've done it so this comes from experience. XD
