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What is described as a device with specific resistance and is used to control current?
A current shunt is a device with a very low resistance, usually around one ohm. The exact resistance of the shunt is printed on the device for reference, and it is often slightly higher or lower than nominal, for example a 1 ohm shunt may actually have a resistance of .99986 ohms or 1.0002 ohms. A current shunt is not used to control current, however, so I do not know if this is the device you are asking about. It is used to measure current by using a precision voltmeter to measure the voltage drop across the shunt, and then using ohms law to calculate the current. Voltage (Volts) divided by Resistance (Ohms) equals Current (Amps). When the shunt is placed so that it interrupts a circuit, (placed in series), the current flowing in the circuit can be accurately measured with the shunt, without changing the values in the circuit enough to affect it. Many shunts of this type have a large heavy duty resistor that does not overheat easily. The shunt should also have a max current rating listed on it.
What else can I help you with?
Why shunt resistance must be small in ammeter?
An ammeter has to measure to current flowing through the circuit. Resistance offers an obstruction to the current flow. So, if the resistance of an ammeter is large , the current measured by the ammeter will be quite less as compared to the actual amount of current flowing through the circuit which is undesirable. If ammeter has zero resistance , then it will give the exact value of current. But this is not practically possible because every material has some value of internal resistance which we can't control. For this reason , ammeter must have small resistance
What is the three basics of electrical?
The three basics of electricity are voltage, current, and resistance. Voltage, measured in volts, represents the electrical potential difference that drives current through a circuit. Current, measured in amperes, is the flow of electric charge, while resistance, measured in ohms, is the opposition to that flow. Together, these three concepts are described by Ohm's Law, which states that voltage equals current multiplied by resistance (V = I × R).
How does load current varies with the load resistance?
Load current is related to load resistance by an inverse relationship. The load current increases linearly as load resistance decreases. Remember, the less resistance, the more current.
How is current related to resistance in a circuit?
Ohm's law: voltage is current times resistance. Restating this; current is voltage divided by resistance, so increasing resistance would decrease current.
When resistance decreases what happens to current?
Based on the simplest Electrical Equation V = I * R,(reads: voltage equals current multiplied by resistance)then, rearranged I = V / R .As resistance decreases, current flow proportionately increases
What is a device that can control the current in a circuit?
A variable resistor can be used to control the current in a circuit by adjusting its resistance. By changing the resistance value, the amount of current flowing through the circuit can be regulated.
What does a variable resistor do and how does it affect the flow of electric current in a circuit?
A variable resistor is a component that can change its resistance value. By adjusting the resistance, it can control the flow of electric current in a circuit. Increasing the resistance reduces the current flow, while decreasing the resistance increases the current flow. This allows for precise control of the current in a circuit.
What is the role of resistance in an electric circuit and how does it affect the flow of current?
Resistance in an electric circuit is the opposition to the flow of electric current. It is measured in ohms. Resistance affects the flow of current by reducing it, as higher resistance leads to lower current flow. This relationship is described by Ohm's Law, which states that current is inversely proportional to resistance in a circuit.
Does a rheostat control strength of current?
Yes, a rheostat controls the strength of current by adjusting the resistance in a circuit. Increasing the resistance using a rheostat reduces the current flow, while decreasing the resistance increases the current flow.
What is the rheostat?
It is a variable resistance device which control the flow of current
What is the purposed of resistance in the circuit?
Resistance is generally used to control the flow of amount of current in the circuit.
What happens to current flow when the resistance is higher than normal?
For a specific voltage, current flow is inversely proportional to resistance.
How are current, voltage, and resistance related in an electrical circuit?
In an electrical circuit, current is directly proportional to voltage and inversely proportional to resistance. This relationship is described by Ohm's Law, which states that current (I) equals voltage (V) divided by resistance (R), or I V/R.
What will happen to the current if double the length of the wire?
If you double the length of the wire while keeping the resistance constant, the current will halve because resistance is directly proportional to the length of the wire. This is described by Ohm's law (V = I * R), where V is voltage, I is current, and R is resistance.
What is the relationship between power (P), current (i), and resistance (r) in an electrical circuit?
The relationship between power (P), current (i), and resistance (r) in an electrical circuit is described by the formula P i2 r. This means that power is directly proportional to the square of the current and the resistance in the circuit.
What is the conductor of 5 ohms?
A conductor with a resistance of 5 ohms allows electric current to flow through it with relatively low resistance. The specific materials and dimensions of the conductor determine its resistance; for example, copper or aluminum wires can have different lengths and cross-sectional areas that influence their overall resistance. In practical applications, a conductor's resistance affects how much current can pass through it for a given voltage, as described by Ohm's Law (V = IR).
What is the relationship between ohms resistance and amps for current?
Ohm's Law states that the current (amps) in a circuit is directly proportional to the voltage and inversely proportional to the resistance (ohms). This relationship can be described by the formula I = V/R, where I is the current, V is the voltage, and R is the resistance.
