0
Add your answer:
Earn +20 pts
What is numerical pattern that increases or decreases at a constant rate or value?
An arithmetic sequence is a numerical pattern where each term increases or decreases by a constant value. This constant value is called the common difference.
Does a Resistor have a different resistance when connected to a power source vs if the resistance is tested when the resistor is out of circuit?
No, the resistance of a resistor remains the same whether it is connected to a power source or tested out of circuit. The resistance value is an intrinsic property of the resistor and does not change based on the external conditions.
Graph of resistance of filament lamp against potential difference?
As potential difference increases in a filament lamp, resistance also increases due to an increase in temperature. The relationship between resistance and potential difference in a filament lamp is non-linear due to the temperature-dependent nature of resistance in the filament material. At low voltages, the resistance is relatively low, but as the temperature of the filament increases with higher voltages, the resistance also increases.
What is the only way to change the value of Kw?
The value of Kw, which is the equilibrium constant for the autoionization of water, can be changed by changing the temperature of the water. As temperature increases, the value of Kw also increases because the ionization of water is an endothermic process.
Why the wires in the resistance box are double folded?
The wires in the resistance box are double folded to reduce their resistance value by a factor of 4, as resistance is inversely proportional to the cross-sectional area of the wire. This allows for more precise resistance increments to be achieved by varying the length of wire exposed in the circuit.
Time constant of an RC circuit increases if the value of the resistance is?
Answer : increase The time required to charge a capacitor to 63 percent (actually 63.2 percent) of full charge or to discharge it to 37 percent (actually 36.8 percent) of its initial voltage is known as the TIME CONSTANT (TC) of the circuit. Figure 3-11. - RC time constant. The value of the time constant in seconds is equal to the product of the circuit resistance in ohms and the circuit capacitance in farads. The value of one time constant is expressed mathematically as t = RC.
Why does power decrease when resistance increases?
First, this statement stands as long as voltage is constant. If you held the current constant then power would increase as resistance increases.V=IR. For a fixed voltage if you increase the resistance (R) then the current (I) will decrease - following the formula.Power = VI so as the resistance increases the value of VI (power) decreases as V is constant and I gets smaller.Therefore the power is decreasing as the resistance increases (when voltage is held constant).Hope this helps.
What happens to the voltage if the current increases?
Yes, if the resistance remains constant. Power is voltage times current, and current is voltage divided by resistance, so power is voltage squared divided by resistance. In essence, the power increases as the square of the voltage.
What can resistance do?
U didn't clearify resistance in what aspect. If u mean electrical resistance,Resistance is phenomenum which describes the limitation of the flow of electric current in an electrical circuit. According to Ohms law (V=IR),the value of resistance is directly proportional to the value of voltage and inversely proportional to the value of current.That is,as the value of resustance increased,voltage also increases;also if the valur of resistance increases,the current reduces(as in I=V/R)
What is numerical pattern that increases or decreases at a constant rate or value?
An arithmetic sequence is a numerical pattern where each term increases or decreases by a constant value. This constant value is called the common difference.
What is the value of the resistance of an short circuit?
ohms
The value of resistance of an short circuit?
The value of resistance when there is a short circuit varies depending on the nature of the fault, but it could be fractionally above zero or higher.
The time constant of a circuit that contains inductance and resistance follows what type of curve.?
1.cosine 2.exponential 3.min-max value 4.sine
What does the resistance of a circuit mean?
Resistance in a circuit is its ohmic value of the circuit. It is comprised of all of the devices and components that make up the circuit. This also includes the wire that carries the voltage to the load of the circuit.
How do you calculate inductive time constant?
The inductive time constant (L/R) is calculated by dividing the inductance of the inductor (L) by the resistance of the circuit (R). It represents the time it takes for the current in the circuit to reach approximately 63.2% of its maximum value during the charging or discharging of the inductor.
What happens if the current is constant and voltage increases?
Generally the voltage is constant and current varies as per the load. Load can vary and hence current can vary. You are stating an abnormal situation, where in voltage increases while current remains constant. I am assuming a constant load situation then normally when voltage increases, the current tends to reduce since over all load remains same. If the voltage goes up beyond a limit the insulation fails and may lead to short circuit, equipment failure, shock and fatality
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.
