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What is V mA?
or: V = voltage in volts (V) I = current in milliamps (mA) R = resistance in kilohms (k ) For most electronic circuits the amp is too large and the ohm is too small, so we often measure current in milliamps (mA) and resistance in kilohms (k ).
When voltage is doubled what happens to current?
The current is directly proportional to the voltage and inversely proportional to the resistance. Any alteration in the voltage will result in the same alteration of the current. So doubling or tripling the voltage will cause the current to be doubled or tripled.
What is V IxR?
From this, we conclude that; Current equals Voltage divided by Resistance (I=V/R), Resistance equals Voltage divided by Current (R=V/I), and Voltage equals Current times Resistance (V=IR). That is; V=IxR, I=V/R, R=V/I.
What does a capacitor do?
capacitor, device for storing electrical energy, consisting of two conductors in close proximity and insulated from each other.
What is a Kiloohm?
One kiloohm is equal to 1,000 ohms, which is the resistance between two points of a conductor with one ampere of current at one volt. The kiloohm is a multiple of the ohm, which is the SI derived unit for electrical resistance. In the metric system, “kilo” is the prefix for 103.
How much current does a 9v battery push thru a 3 resistor?
so 9/3=3 current is 3 amperes.
Can there be current without voltage?
Voltage is the Cause, Current is the Effect Voltage attempts to make a current flow, and current will flow if the circuit is complete. It is possible to have voltage without current, but current cannot flow without voltage.
Why does the current decrease when the voltage increases?
The current required to carry a given power decrease when you increase the voltage because the power is the product of the current with the voltage (and power factor).
Do Capacitors store AC or DC?
Capacitors store charge or energy, not power. the charge and the energy are neither ac nor dc. the amount of charge or energy stored in a capacitor can vary from moment to moment.
Is a battery a capacitor?
battery A device that can convert chemical energy into electrical energy. capacitor An electrical component used to store energy. Unlike batteries, which store energy chemically, capacitors store energy physically, in a form very much like static electricity.