Ohm's Law: Voltage is current times resistance.
4 amperes times 125 ohms equals 500 volts.
Power Law: Watts is voltage times current
4 amperes times 500 volts equals 2000 watts.
WARNING: This is a lot of power. Do not attempt to duplicate this in the lab
without the proper equipment as there is great risk of fire.
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Power dissipated by a resistance = (current)2 x (resistance) = (4)2 x (125) = 2000 W.
As the first contributor noted, this is a healthy amount of power dissipation. It's not
necessarily dangerous if you're prepared for it . . . hair dryers, toasters, baseboard
heaters, electric stoves and furnaces do it every day. But if you're in the engineering
lab playing with a power supply and a bagful of 1/2-watt resistors, then things will not
work out as the math predicts, since the resistors are likely to explode catastrophically
before you have a chance to read the ammeter.
3125 watts
Current = (Voltage across the circuit) divided by (Total resistance of the circuit). The current is the same at every point in the series circuit.
Resistance
Increases the total resistance
Yes In parallel circuit , current entering into the circuit will be divided intodifferent paths ( resistances) . Amount of current flow depends upon the magnitude of resistance applied in the circuit. Total current after passing through the circuit will be the sum of all current through each resistance.
Voltage divided by total resistance will give the current. The resistance is simply the sum of all the individual resistances.
ohms law calculation for a series circuit - Total Resistance = Total Voltage divided by Total Current
Current = (Voltage across the circuit) divided by (Total resistance of the circuit). The current is the same at every point in the series circuit.
Total resistance.
Current will be decreased because of the resistance of the ammeter added to the circuit's resistance. In other words total resistance increases.
Resistance
Increases the total resistance
As long as the voltage between the ends of the circuit remains constant, the current through the circuit is inversely proportional to the total effective resistance of the circuit.
Yes, additional resistors affect current in a series circuit by increasing the total resistance, which decreases the total current.
by adding the the resistances in series the total resistance of the circuit increses and thus the crunt flowing in the circuit decrese. Ans 2 . the current in series circuit of constant resistance will always be the same . It will not effect the current .
Yes In parallel circuit , current entering into the circuit will be divided intodifferent paths ( resistances) . Amount of current flow depends upon the magnitude of resistance applied in the circuit. Total current after passing through the circuit will be the sum of all current through each resistance.
The technical definition is "Electrical resistance is a ratio of the degree to which an object opposes an electric current through it, measured in ohms." In simplfied terms, electrical resistance is broadly equivalent to friction in a mechanical system. If you applied a voltage to a circuit with zero resistance then you would get an infinite current. In reality all circuits have some resistance which limits the current. We can predict the current in a given circuit using Ohms law: V = I x R Where: V is Voltage (measured in Volts) I is current (measured in Amps) R is resistance (measured in Ohms)
Voltage divided by total resistance will give the current. The resistance is simply the sum of all the individual resistances.