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Power may be expressed as what times resistance?
Power=current squared times resistance
How is ohm's releted the power?
Ohm's Law relates voltage (V), current (I), and resistance (R) in an electrical circuit, expressed as V = IR. Power (P) in an electrical circuit can be calculated using the formula P = VI, which can be further expressed in terms of resistance as P = I²R or P = V²/R. This shows that power is directly proportional to the square of the current or voltage, while also being influenced by resistance. Therefore, Ohm's Law provides a foundational understanding of how voltage, current, and resistance interact to determine electrical power.
When a resistive AC circuit contains inductance the total opposition to current flow is called?
The resistance of an a.c. load is called 'resistance' (R). Resistance is not affected by frequency, only by the cross-sectional area, length, and resistivity of the conductor. Having said that, because of the skin effect, which causes an a.c. current to flow closer to the surface of the conductor, the effective cross-sectional are is reduced, so the value of a.c resistance is somewhat higher than the d.c. resistance -this difference increases with frequency.The opposition to a.c due to inductive or capacitive loads is called reactance (inductive reactance or capacitive reactance), and the overall opposition to a.c. current is the vector sum of resistance and reactance, and is called impedance. That is:(impedance)2 = (resistance)2 + (reactance)2
What is the apparent rule for total resistance when resistors are added up in series?
The total resistance in a series circuit is simply the sum of the individual resistances of all the resistors connected in that series. This means that if you have multiple resistors, you add their resistance values together to find the total resistance. Mathematically, it can be expressed as ( R_{total} = R_1 + R_2 + R_3 + \ldots + R_n ). The total resistance increases as more resistors are added in series.
When a resistor is connected in parallel what happens to the size of current form the battery?
When a resistor is added the current goes down, that is expressed in the equation current= voltage/ resistance
How is the resistance of a motor winding expressed?
The resistance of a motor winding is expressed in
What is isolation resistance?
I think you mean, 'insulation' resistance! It's the resistance of insulation, normally expressed in megohms.
Power may be expressed as what times resistance?
Power=current squared times resistance
What is the ratio of electric current and voltage in the closed circuit?
The name given by engineers to the ratio of "electrical potential difference" (expressed in volts) to "rate of current flow" (expressed in amperes) is "resistance" (expressed in ohms).
What is conductance?
The word conductance is defined as the reciprocal of resistance. It is inversely proportional to the resistance. Mathematically, it can be expressed as: G=(1/R) or G=(R/z^2)
What is 1000 ohms?
"1,000 ohms" is the resistance of anything through which the current, expressed in amperes, is numerically equal to 0.001 times the potential difference between its terminals, expressed in volts.
What is the difference between capacitor and battery?
CAPACITOR'S REACTANCE CHANGES WITH FREQUENCY WHEREAS A BATTERY'S RESISTANCE IS FIXED. ALSO BATTERY STORES ENERGY AND IS EXPRESSED IN UNITS AS AMPERE-HOURS, WHERE AS CAPACITOR STORES CHARGE AND AND IS EXPRESSED IN UNITS AS MICRO / NANO FARADS
What is the temperature co-efficient of a resistance of a thermister?
The temperature coefficient of a thermistor is a measure of how much its resistance changes with temperature. It is typically expressed in units of percent resistance change per degree Celsius. Negative temperature coefficients mean the resistance decreases as temperature increases, while positive coefficients mean the resistance increases with temperature.
What is the ratio of potential difference to the current of a circuit?
The ratio of potential difference to current in a circuit is known as resistance, measured in ohms (Ω). This relationship is described by Ohm's Law, which states that resistance equals voltage divided by current (R = V/I).
What is a definition of opposition?
The definition of opposition is resistance or dissent expressed by action or argument. For example, if you were to play a sport, the team you are against is your opposition.
How is ohm's releted the power?
Ohm's Law relates voltage (V), current (I), and resistance (R) in an electrical circuit, expressed as V = IR. Power (P) in an electrical circuit can be calculated using the formula P = VI, which can be further expressed in terms of resistance as P = I²R or P = V²/R. This shows that power is directly proportional to the square of the current or voltage, while also being influenced by resistance. Therefore, Ohm's Law provides a foundational understanding of how voltage, current, and resistance interact to determine electrical power.
What is microsiemens?
A siemens is a unit of conductance or admittance, expressed as the reciprocal of resistance or impedance. (Siemens = 1/ohms) One microsiemens is 1 megohm.
