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How much resistance must be placed in a 110 volt circuit in order to limit the current to 2 amps?
Ohm's Law: Resistance = Voltage divided by current
110 volts / 2 amperes = 55 ohms
Note: This represents 220 watts, which is a considerable amount of power for a resistor. In all likelihood, the resistance will change as a result of that amount of power (heat) so the end result, 55 ohms, is only valid as an absolute number, in that 55 ohms is the answer, but the cold value of the resistor is uncertain.
What else can I help you with?
What is the Effect of collector resistance in emitter follower circuit?
Colector resistance in an emitter follower circuit serves to place a limit on how much current can be supplied by the transistor. Often, the resistor is sized so that a short circuit in the load does not cause the transistor to fail.
What is the job of a resistor?
To limit current flow in a circuit
Why the armature rheostat of dc is motor kept at maximum resistance position?
It isn't. It is only kept at maximum resistance when the motor is not running. That is done to limit the starting current.
What would happen to a series circuit if another bulb was added?
A: Adding any resistance bulbs or whatever in a series circuit will reduce current and will reduce total power. In this case the bulb will glow dimmer as any additional bulbs are placed in the series circuit. this is true if the same input source is kept constant.
Why terminal potential difference is decrease when current in the circuit is increased?
The terminal potential difference decreases when the current in the circuit is increased due to the internal resistance of the power source. As the current increases, the voltage drop across the internal resistance also increases, leading to a decrease in the terminal potential difference available to the external circuit. This is described by Ohm's Law, V = E - Ir, where V is the terminal potential difference, E is the electromotive force of the source, I is the current, and r is the internal resistance.
What does not limit current flow in a circuit - capacitance - high conductor resistance or longer conductor?
Of the three choices, capacitance does not limit current flow in an AC circuit.
How does a resistor work to limit the flow of electric current in a circuit?
A resistor limits the flow of electric current in a circuit by providing resistance to the flow of electrons. This resistance reduces the amount of current that can pass through the circuit, helping to control the flow of electricity and prevent damage to components.
Do resistors limit current or voltage in an electrical circuit?
Resistors limit the flow of current in an electrical circuit.
What is the significance of impedance in electrical circuits and how does it affect the flow of current?
Impedance in electrical circuits is important because it measures the opposition to the flow of alternating current. It consists of resistance and reactance, which affect how current flows through a circuit. A higher impedance means there is more resistance to the current flow, which can limit the amount of current that can pass through the circuit. This can impact the efficiency and performance of the circuit.
What is the Effect of collector resistance in emitter follower circuit?
Colector resistance in an emitter follower circuit serves to place a limit on how much current can be supplied by the transistor. Often, the resistor is sized so that a short circuit in the load does not cause the transistor to fail.
Can a capacitor limit current in a circuit?
No.
Can a 12vac coil be operated by 24vdc?
no, in an ac circuit the coil provides impedance but the DC coil needs some resistance to limit the current
How do resistors limit the flow of current in a circuit?
Resistors limit the flow of current in a circuit by impeding the movement of electrons, causing a drop in voltage and reducing the overall current passing through the circuit.
What are the reasons for connecting resistance in the rotor circuit when starting wound rotor induction motors?
To limit the starting current in slip ring induction motors.
A resistor is required to limit the current taken by a battery when being charged from a 25V dc source. Continued......?
QUESTION (continued from above) ....The battery has negligible resistance and its open-circuit voltage is 20V. Determine the resistance, if the current to the battery is to be limited to 25A.
Why is there a limit to the amount of current that can be used in an electromagnet?
Exceeding the current limit in an electromagnet can lead to overheating and potentially damaging the wire insulation, causing a short circuit. This limit is determined by the wire's resistance and the heat dissipation capabilities of the electromagnet. By staying within this limit, the electromagnet can operate efficiently and safely.
What are the practical applications of resistor?
To limit current in circuit
