Difference in potential between two points. Like the voltage of an energizer AA battery is 1.5 volts BETWEEN its terminals. If you place two AA batteries in a flashlight, the voltage of the series combination of AA batteries from one tip to the other is now 3 volts.
A. It is measured in volts. B. It is related to current and resistance by Ohm's Law. D. It's what makes current flow in a circuit.
A it is an EMF it can exists in its form without performing any work
True
voltage is devided only in series circuit and is the same at the parallel circuit
They're not! The relationship you describe is derived from the definition of the ohm, not from Ohm's Law. This tells us that resistance is equal to the voltage divided by the current. Ohm's Law merely tells us that the ratio of voltage to current is constant for variations in voltage -which, unfortunately, is not actually true. In other words, Ohm's Law is not true!
The first statement is true, the motor needs a power source to operate.
On some motor nameplates you may see 120/208-240. These are not true tri-voltage motors. They are dual voltage motors with a leniency on the 240 volt range to be derated to run on 208 volts. At this voltage the current drops and you don't get the full horse power rating of the motor. To answer your question I have never seen one that would do true three voltages like 120/240/480.
True. The voltage rating of a fuse must be greater than the circuit voltage.
true
True power is expressed in watts, so the true power of your heater is its kilowatt rating at its rated voltage. Variations in voltage will result in variations in its power. Assuming its resistance remains roughly constant for variations in temperature, then True Power = V2/R.
false
True
True. Ohm's law states the voltage is resistance times current.
True! Depending on the designed specifications of the tacho, the voltage generated is usually in the range of around 0 to 36 volts.
Yes. If you reduce the voltage to the same device, then it uses less power.
true
amplify voltage, the more wraps in the coil the more voltage I think. others may improve this answer but thats what i have found to be true.
zero That's not always true. If you have a 12 volt battery not connected to anything and you measure the terminal voltage, it will be 12 volts.
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