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You can use Ohm's Law, which basically defines resistance:R = V/I (voltage divided by current).
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The cord of an electric oven does not glow while the heating element glows.Why?
The cord is manufactured to have as low a resistance as possible, while the heating element is intentionally manufactured with a carefully controlled resistance. The current through the whole loop ... cord plus heater ... is determined by the resistance of the whole loop. The magnitude of the current 'I' is (E/R) ... E = the utility line voltage, R = resistance of the cord+heater. But the power dissipated by each individual resistance in the loop is proportional to the resistance of that section. P = I2R. So the heating element dissipates more power than the low-resistance line-cord does.
What three variables affect peripheral resistance to blood flow?
Resistance is determined by three properties: the lengthand cross-sectional area of a material, and its resistivity. Since resistivity is affected by temperature, you could say that temperature indirectly affects resistance.
What is the law of resistance?
The laws of resistance describes the resistance of a specific material. There are a total of four laws of resistance.
How do you control the brightness of a lamp in a circuit?
Use a dimmer switch or even easier squint your eyes.
What happens to the resistance of a material with a positive temperature coefficient when it is heated?
Positive Temperature coefficient indicates that the resistance of material INCREASES with rise in the temperature. Resistance Temperature COefficient(RTC) is defined as increase in resistance per unit original resistance per unit rise in temperature. Temperature Coefficient of Resistance=R2-R1/(R1*(T2-T1)) Where: R2:Resistance at temperature T2 R1:Resistance at temperature T1 SO from formula it is clear that if resistance increases with temperature(T2-T1>0 and R2>R1) then Difference R2-R1 will be positive hence RTC will have positive value. But if with increase in temperature(T2-T1>0) resistance decreases(R2<R1) then difference R2-r1 will be negative hence RTC will be negative.
What is the cause of resistance and how the resistance and how the resistance of a wire can be determined?
Electrical resistance can be determined by the equation that defines resistance - Ohm's Law. Just divide the voltage across a resistor, by the current passing through it.
How is the total resistance in a series circuit is determined?
The total resistance in a series circuit is determined by adding (summing) the individual resistances of each component in the circuit.
If voltage is high will the resistance be high?
The electric resistance is related to the diameter and extension of the wire submitted to a determined voltage which will determine the electric current flowing into the wire.AnswerVoltage has no effect on resistance. Resistance is determined by the length, cross-sectional area, and resistivity of a material (resistivity is affected by temperature, so temperature indirectly affect resistance).
Describe how the resistance of a material is determined?
Resistance is measured in ohms and the amount of resistance that allows one ampere of current to flow when one volt is applied is one ohm.
What are the output voltage and current of a transformer determined by?
The secondary (output) voltage is determined by the primary voltage and the turns ratio of the transformer. The secondary current is determined by the secondary voltage and the load resistance.
The resistance to an ion's movement across a membrane is determined by?
ion channels within the membrane
How is IMA determined for pulleys?
IMA for pulleys is the resistance force divided by the effort force.
What determines the extent of resistance to a change of motion?
The extent of resistance to a change of motion is determined by an objects mass. The mass of the object is measured in kilograms.
When a series circuit containing resistance and inductive reactance is connected to a ac supply the current will?
The load current will lag the supply voltage by an angle called a 'phase angle', determined by the values of resistance and inductive reactance. The magnitude of the load current will be determined by the impedance of the circuit, which is the vector sum of the resistance and inductive reactance.
How can instantaneous current values be determined?
Voltage divided by the resistance of what ever you want to measure the current in.
What value of electricity would kill you?
.10 amp could be fatel, the higher the ampage the more likely. Ampage is determined by the voltage and the resistance. ampage= voltage/ resistance
What is conducted?
In electricity current is conducted. The conduction is caused by a voltage and the amount of current conducted is determined by a resistance. This is in accordance to Ohm's law.
