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Electrical resistance is measured in Ohms.
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∙ 13y ago
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Power may be expressed as what times resistance?
Power=current squared times resistance
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
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
If a circuit has a resistance of 2000 ohms and has voltage of 30 volts what is the current expressed into metric units?
I=U/R so 30/2000=0.015 so 15 mA
If resistance is constant and voltage increases what happens to current?
You have it backwards, the resistance controls the current not the current controls the resistance. I = E/R . Your question should read, "If the voltage is constant and the resistance in the circuit is increased what happens to the current?" Say the voltage is 120 volts and the resistance is 30 ohms, I = 120/30 = 4 amps. Now we double the resistance to 60 ohms, then I = 120/60 = 2 amps. So now you can see if you increase the resistance the current drops.
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
How mechanical advantage is expressed?
the resistance force multiplied by the effort force
What is the relationship between ohms resistance and amps for current?
The relationship is expressed by Ohm's Law: V=IR (voltage = current 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 ratio of potential difference to the current of a 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 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 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.
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
