###### Asked in Home Electricity

Home Electricity

# What does 600mA mean?

## Answer

###### Wiki User

###### February 01, 2009 1:05AM

600 milliamps. Milli = 1000. 6/10th of an amp.

## Related Questions

###### Asked in Appliance Voltage and Travel Issues

### Can you use a 9v 600Ma adaptor to power a 9v 300Ma appliance?

I think you mean to ask if one can use a 9v 600mA adapter to
power a 9v 300mA appliance. Yes, you can do that. A 9v 600mA
adapter will deliver 9v at up to 600mA.
A mA is one milli amp, or one thousandth of an amp.
300mA is 300 thousandth of an amp, 300/1000 or 0.3 amps.
600mA is 600 thousandth of an amp, 600/1000 or 0.6 amps, and is
twice the current of 300mA.

###### Asked in Electronics Engineering, Electrical Engineering

### Can you use a 4.5 DC V 600mA in place recommended 4.5 DC V 100mA?

Possibly.
If the 600mA device is regulated, then yes. If it isn't
regulated then the voltage could be significantly higher than
4.5.
If you have access to a voltmeter, connect a 47 ohms resistor
across the output of the 600mA unit, and measure the voltage. If
it's close to 4.5 it should be safe to use instead of the 100mA
unit.

###### Asked in Circuits

### What does the resistance in an electrical circuit limit?

Current flow. It's also worthy of noting that a resistor doesn't
limit-by, it limits-to, and the current is dependent on the
voltage.
I[A] = U[V] / R[ohm]
It's also worth to note, that the power flowing through said
resistor with resistance R is I[A] * U[V] for DC circuits - helps
to remember this well when picking appropriately-rated resistors
for replacement.
Example: let's say we have a 20-ohm, 2W resistor. If we place it
in a circuit with 5V, we will get 5V / 20ohm = 250mA (0.25A) of
current flowing through the resistor. The power the resistor will
"see" is 250mA * 5V = 1.25W, so it's safe.
But let's now put that same resistor in a 12V circuit. The
current flowing will be 12V / 20ohm = 600mA (0.6A), and the power
will be 600mA * 12V = 7.2W, so the resistor will burn.

###### Asked in Home Electricity, Math and Arithmetic, Statistics, Definitions

### What does 9v 600ma mean?

Its the nominal output of a electric charger required to run a
certain device. The charger is designed to provide 9volts up to a
current draw of .6 of an amp. The device it powers will need 9volts
and a maximum current draw of .6 of an amp to charge/run it
properly. Think of a water tank in a house being fed from the water
main. The voltage is the head of water in the tank. Turn on the tap
and the current is the rate of water flow. The water can only be
supplied at a certain rate. Exceed the rate and the head of water
(voltage) drops and needs to be replenished.