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Q: What is the current flow in amps in a circuit with an emf of 20v and a total resistance of 4 ohms?
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What happens to amps when you increase the resistance of a circuit?

If you don't change the voltage between the ends of the circuit,then higher resistance in the circuit means lower current (amps).


What is the resistance of the circuit if the voltage is 230 volts and the current flowing is 5 amps?

The resistance of the circuit will be 46 ohms


How do you find voltage when amps is known?

You don't. If you know how many Amperes in an electrical circuit and also what the total resistance in the circuit is, then EMF (Volts) = current (Amps) x resistance (in Ohms). EMF stands for Electromotive Force, and its unit of measure is the Volt.


How do you find resistance when you have current and resistance total?

If you are looking for the resistance of each resistor in either a series circuit or a parallel circuit you must measure the current I and the voltage V for each resistor. Then calculate its resistance using Ohms Law R = V / I where I = current (Amps), V = voltage (Volts) and R= resistance (Ohms).


How do you work out the current in a circuit?

we can calculate the current in a commmon electrical circuit by this formulae i.e,I=V\R where i is the current flowing in the conductor, R is resistance , V is the voltage.. THE FORMULA IS CORRECT but the term conductor does not suffice an explanation since a conductor is low in resistance R= resistance not conduction.


What happens to the current flow in a circuit when a second component is added in series?

The total current decreases.According to the Ohm's law the current & the resistance are inversely proportional so when we put a load in series with the existing load, the resistance of the circuit increases therefor the current decreases.


What is the power of a parallel circuit with a resistance of 1000 ohms and a current of 0.03 amps?

.9 watts.


Using ohm's law what is the formula to find the resistance in a circuit?

Resistance of the circuit = (voltage across the circuit) divided by (current through the circuit)


What is the resistance of a circuit that takes a current of 0.5A when the voltage to the circuit is 40v?

The formula you are looking for is Ohms = Volts/Amps. R = E/I.


How many amps will a 260 ohms resistor on a 120 volt circuit use?

Just use Ohm's Law Voltage = Current x Resistance Amps = Voltage Divided By Resistance Amps = 120 / 260


What is the resistance in a simple circuit if voltage is 12 volts and current is 3 amps?

Ohm's Law: Resistance = voltage / current, so 12 / 3 = 4 ohms.


What happens to the total resistance of a series circuit when another resistor is added?

Simply put, the purpose of a resistor is to 'resist' the flow of current. Ohm's Law tells us that for a given voltage, the larger the resistance, or value of that resistor, the lower the current that will flow. Ohm's Law states that I (current) = E (voltage) / R (resistance) - where current is measured in amps, voltage is measured in volts and resistance is measured in ohms.