Can 30 ohm resistance able to work for 27 ohm resistance?

Why ohm law is not valid in electric tube?

Ohm's law is always valid. Every time. Every place. No exceptions. That's why it is called a law. If it appears that the "law" is not being "met", then you are not taking some factor of the circuit into account. It is true that some circuits and devices exhibit dynamic resistance. Claiming that this is a violation of Ohm's law is a misunderstanding of the law. Ohm's law does not say that resistance is constant. Ohm's law says that resistance is voltage divided by current. Take an ordinary 40 watt light bulb, for example. It has a cold resistance of about 27 ohms. Connect it to 120 volts, and you would expect 40 watts, but that computes to 360 ohms. Did Ohm's law fail? No. The temperature coefficient of the filament from cold to hot simply got in the way. Remember: Resistance is voltage divided by current. Nothing more. Nothing less.

Why do electronic circuits not follow Ohm's Law?

All circuits follow Ohm's law, without exception. If it appears that it is not, then you are not accounting for some particular factor of that circuit, such as dynamic resistance.Ohm's Law states that resistance is voltage divided by current. This is the formal definition of the ohm. This holds true in every case, not matter what. What throws people off is the fact that resistance is not constant, particularly in diodes and transistors, but even in ordinary resistors, due, in that case, to something called temperature coefficient. Take an ordinary 40 W light bulb for instance. It has a cold resistance of about 27 ohms, but a hot resistance of 360 ohms. Does it comply with ohm's Law? Yes, indeed, it does! You just have to take the specific circumstances into account.Ohm's law does not say that resistance is constant; it says that resistance is voltage divided by current. Understand that and learn.AnswerI completely disagree with the above answer. While the ratio of voltage to current will always indicate the resistance (which is how resistance is defined, NOT Ohm's Law!) for that particular ratio, Ohm's Law only applies when that ratio remains constant over a range of voltage variation. There MUST be a straight-line relationship between voltage and current for Ohm's Law to apply -PERIOD! For this reason, a tungsten lamp's filament, which produces a curved-line graph, does NOT obey Ohm's Law.Ohm's Law applies to so few materials and devices, that one questions why it is still being taught as a 'law'!

What is the internal resistance of a new D battery with an emf of 1.5 V and a wire of negligible resistance is connected between the terminals of the battery a current of 27 A is produced?

"In short, it is 0.055555555555555555555555555555556OhmsYou can use ohms law to calculate this.You will use the formula: Resistance Equals Voltage Divided by Current.It is written: R=V/ISo use the numbers you provided, and the formula above.1.5 / 27 = 0.055555555555555555555555555555556"I dispute this answer. emf = I(R+r) is the actual equation u need. From this equation, u will find that V = emf - Ir. Ohm's law is not applicable for this situation. However I do think you will need a voltage to find the internal resistance.

Why conductors don't obey ohms law at large current?

Ohm's Law always applies. In every case. That is why we call it a law. Its a matter of perspective.Ohm's Law says that resistance is voltage divided by current. Nothing more. Nothing less. In particular, it does not say that the "resistor" has constant resistance.At large currents, conductors get warm. Temperature changes their resistance. Ohm's Law still applies - you just need a new value of resistance.Take an ordinary 40 watt light bulb. At operating power, it has a resistance of about 360 ohms. When cold, it has a resistance of about 27 ohms. Does it obey Ohm's Law? You bet it does - You just need to understand what the law says and what it does not say.AnswerOhm's Law most definitely does NOT state that 'resistance is voltage divided by resistance'! It states, essentially, that the ratio of voltage to current must be constant for variations in voltage -which is not the same thing! For Ohm's Law to apply, then, the ratio of voltage to current must remain constant for variations in voltage. So devices such as diodes, or conductors such as tungsten, do not obey Ohm's Law and are, for that reason, termed 'non-linear' or 'non-ohmic'. If you conducted an experiment using tungsten, for example, and plotted current against variations in voltage, the result would be a curve -confirming that tungsten does notobey Ohm's Law. In other words, Ohm's Law is NOT a universal law, and only applies to some materials or devices.To answer your question directly if, as the current gets larger, the resistance of the conductor changes (due to an increase in its temperture), then the ratio of voltage to current obviously changes too -which means that it is not obeying Ohm's Law. If, on the other hand, an increasing current does not cause a change in resistance (because any increase in temperature does not cause an increase in resistance), then the ratio of voltage to current is constant, and the conductor IS obeying Ohm's Law.

Why semiconductors does not obey ohms law?

Tungsten is an example of a conductor that does not obey Ohm's Law. If you were to plot a graph of current against voltage, over a range of voltages, you will find that the result is a curve - showing that current is not directly proportional to voltage, which is the requirement for Ohm's Law.While the ratio of voltage to current will indicate what the resistance happens to be for that particular ratio, you will find that, for tungsten, that ratio continually changes as you increase voltage - proving that tungsten does not obey Ohm's Law. The general rule is that if there is no straight-line relationship between voltage and current, then Ohm's Law doesn't apply.The equation, R = V/R, does notrepresent Ohm's Law; it is derived from the definition of the ohm. Ohm's Law is a law of constant proportionality and constant proportionality only applies to linear conductors.

The devices thgat do not follow ohms law?

All devices follow Ohm's law. Ohm's law states that voltage is equal to current times resistance. This is always true. DC, AC, RF, whatever. Resistance, capacitance, or inductance, whatever. Its a matter of proper perspective, and its a matter of taking everything into account.Some devices do not have a linear response to voltage or current.Take the light bulb, for instance. If you measures its resistance you can calculate what you think its current and power would be at a certain voltage, and you would be wrong, unless you also considered temperature. This is because light bulbs have a very dramatic resistance to temperature coefficient. As an example, a 40W applicance bulb might have a cold resistance of 27 ohms. That translates to 4.4A or 533W, with a 120V source. The truth is that the 40W bulb has a hot resistance of 360 ohms, giving an on current of 0.333A and an on power of 40W, with a 120V source.For another example, look at the diode. Initially, it appears to have high resistance. When the voltage across it reachs the forward bias voltage (or the reverse bias voltage for a zener diode) it starts to conduct and draw current. As you increase the current, you note that the voltage is relatively constant. That is certainly not a resistor - the diode's resistance is increasing as current increases so as to make the voltage be somewhat constant. You can still calculate voltage, current, resistance, and power, but only at each point of observation.For the last example, though not really an example of non-linear resistance, consider the capacitor. In a DC circuit, the capacitor initially has zero ohms resistance, but it quickly rises to infinity ohms depending on current and capacitance. In an AC circuit, this a much more interesting and useful case - the capacitor stabilizes at a certain capacitive reactance, and the operation of the curcuit complies with Ohm's law, but lo and behold - you find that the current is no longer in phase with the voltage. While this complicates calculations, nothing changes the fact that voltage is current times resistance. That is an immutable given - your task is to learn how to measure it correctly.In each of these cases, and in any other case, Ohm's law applies, but it applies in a certain way, under a certain set of circumstances. The bulb has 360 ohms of resistance at 120V, giving 0.333A and 40W. That is very clear. What you must maintain equally clear is that resistance is not always a constant - and you must consider that inconstancy every time you change the conditions of the circuit.AnswerOhm's 'Law' is somewhat of a misnomer, because it is not really a universal law because it only applies to a small range of conductors. Ohm's Law only applies when the ratio of voltage to current is constant for variations in voltage. Devices that follow Ohm's Law are called linear or ohmic; those that don't are called non-linear or non-ohmic. Most metal conductors are linear, but some are not. For example, tungsten does not obey Ohm's Law because its ratio of voltage to current changes as the voltage applied across it changes -in other words, tungsten is non-linear. Electronic devices, such as diodes, electrolytes, and gases are all non-linear and do not obey Ohm's Law.Having said that, the ratio of voltage to current will always tell you what the resistance of a device happens to be for that particular ratio and, so, the equation R = V/I applies to all devices whether they are linear or non-linear. However, this equation is not derived from Ohm's Law, but from the definition of resistance.

How do you calculate resistance in electric circuits?

The easiest way to measure ohms is with an ohm meter, which is typically part of an electrical multi-meter. A multi-meter can read many different kinds of electrical variables: AC voltage, DC voltage, amps, and ohms among them.

Work out the square root of 9 then cube it?

27, -27

When was Forest Able born?

Forest Able was born on 1932-07-27.

What is 11 times 27 and show your work?

11 * 27 = 10*27 + 1*27 = 270 + 27 = 297

How do you work 351 divided by 13 in short division?

27

What is factor tree 27 with work shown?

27 9,3 3,3,3