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What is the formula for calculating the power dissipated in a resistor, given the current flowing through it and the resistance value, known as the i2r power?
The formula for calculating the power dissipated in a resistor, known as the i2r power, is P I2 R, where P is the power in watts, I is the current in amperes, and R is the resistance in ohms.
Why does adding more resistance result in less current?
As the name implies, resistance resists current. In the mathematical formula, where E is electromotive force (voltage):- I = E/R If you increase the value of R (resistance), then the value of I (current) decreases.
What happens to power dissipation of value of electric current passing through a conductor of constant resistance is doubled?
Power dissipation in a conductor is given by the formula ( P = I^2 R ), where ( P ) is power, ( I ) is the electric current, and ( R ) is the resistance. If the electric current is doubled, the new current becomes ( 2I ). Substituting this into the power formula results in ( P' = (2I)^2 R = 4I^2 R ), which shows that the power dissipation increases by a factor of four. Therefore, doubling the current through a constant resistance results in a fourfold increase in power dissipation.
What will be earth resistance value of power grid?
Below 5 ohms
What is the formula for calculating the equivalent resistance of a series circuit?
Equivalent resistance of a series circuit is the sum of the resistance of all appliances. The formula is R=R1+R2+... where R is equivalent resistance, R1, R2 and so on is the resistance of the individual appliances.
Does the power ratings affect the value of the resistor?
No. there are many different power ratings for the same resistance. Type your answer here...
What is the usual value of the reactance to resistance ratio in power distribution lines?
0.1~10
What is the correct resistance?
To determine the correct resistance, you need to consider the specific application or circuit in question, including the voltage, current, and the desired power dissipation. Use Ohm's Law (V = IR) to calculate resistance (R = V/I). Additionally, ensure that the resistor can handle the power rating (P = IV) without overheating. Always refer to the circuit requirements or specifications for the most accurate value.
What is the resistance value of 1 meter copper wire?
The resistance value of a 1 meter copper wire depends on its gauge (thickness) and temperature. For example, a 1 meter wire of 24-gauge copper has a resistance of about 25.67 ohms at room temperature. It is important to consider these factors when calculating the resistance of copper wire.
What happens to the power if the resistance of a circuit doubles and voltage remains the same?
the power will be reduced to the haflf because P=V2/R so when the resistance doubles the power reduced to the half of itsoriginal value
What will the value of power dissipate if voltage 5 volts and resistance 0.0007 ohm?
Roughly 36 kilowatts.
What is the resistance of a bulb that uses an average power of 75 W when connected to a 60 Hz power source with a peak voltage of 170V?
You have to convert the peak voltage to an r.m.s. value, before inserting that value into the power equation.
