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which obey ohms law
ANSWER: Not all potentiometers are linear some are made to follow a logarithm function some follows an exponential function. A linear potentiometer will have a linear curve.
Materials that obey Ohm's Law are called 'linear' or 'ohmic'; those that don't are called 'non-ohmic' or 'non-linear'.
What else can I help you with?
Is it correct to say that a bulb in a circuit is a resistor?
Yes it is. The filament in a standard incandescent bulb is a type of resistor. An incandescent light bulb contains tungsten which reduces electricity and converts electricity to heat and light. All incandescent bulbs are resistors, but only a fraction of resistors are bulbs. If you want to see if a bulb is a resistor, try adding another bulb in series without changing the voltage. Both bulbs will be very dim. Another way to test this is to get a multimeter and set the meter to the resistance setting. If you get any value other than zero, then it is functioning as a resistor.
What can you substitute a logarithmic potmeter with?
I would simply suggest taking a linear potmeter of approx a value 700% higher. Then connect a resistor of the original value +20% (approx) across linear pot middle and either side. This makes it working almost like the original logaritmic potmeter. If you want reverse log or dual log, then just connect the resistor to the other leg from middle, or halve the resistor value and connect both from the middle and to each side. If you are unsure how it works, then a spreadsheet provides you with abilities to simulate how it will work. Example of a "Linear Log Pot": A project I started on needed a reverse log taper of 10 K. This was nowhere to be found and I thought, lets cheat. I started with spreadsheet and put in a few formulas for parallell connection of resistors. I found that a 68K linear and a 12K resistor in parallell would give much the same performance curve as a logaritmic taper. It gives approx the same resistance and approx the same voltage (if used as a voltage divider) as a Log and reverse log taper.
Why resistor should disconnected from the circuit when measured the value of resistor?
if not disconnected you will measure the resistance of the circuit in parallel with the resistor.
What is the relation between the size of the resistor and its value?
There is no relation between the resistor's ohms value and its size. The power of the resistor can be seen by its size. If the power is too small, the resistor can be destroyed.
A 5 ohm resistor a 10 ohm resistor and a 15 ohm resistor are connected in series to a 120 volt power source. What is the amount of current flowing between the 5 ohm resistor and the 10 ohm resistor?
The current would be about 20 volts.
What are the two main categories of resistor?
linear and non-linear resistor
Kinds of resistors?
1.)Linear Resistor 2.)Non Linear Resistor a.)Fixed Value Resistor b.)Variable Resistor c.)Package Resistor Taking into account compositon: 1.) Carbon piece 2.) Carbon Deposition 3.) High Volatge Ink Film 4.) Metal Film 5.) Metal Glaze 6.) Wire Wound 7.) Ceramic Metal
Is a Resistor a nonlinear device?
It is a linear device if it is not a wire wound resistor. These become non linear to AC at high frequencies because of their inherent inductance.
Is a voltmeter a linear scale?
This is because the resistance is measured by applying a fixed voltage to the resistor and measuring the current. Since I = V/R, the current/resistance relation is non-linear.
What does a shunt resistor across the base tank coil of a linear amplifier do?
If the shuntresistor should open, the diodes will forward bias
Why you use linear network in thevinins theorem?
Because Thevenin does not work for a nonlinear network, e.g. a battery in series with a diode and resistor.
What can be said about the relationship between voltage and current provided that the resistance is fixed?
It's linear and direct, up to the current-carrying capacity of the resistor.
Is a resistor a linear device?
Yes, if you are talking about the normal carbon composition types having colour codes. But there are some non-linear types too.
Is it correct to say that a bulb in a circuit is a resistor?
Yes it is. The filament in a standard incandescent bulb is a type of resistor. An incandescent light bulb contains tungsten which reduces electricity and converts electricity to heat and light. All incandescent bulbs are resistors, but only a fraction of resistors are bulbs. If you want to see if a bulb is a resistor, try adding another bulb in series without changing the voltage. Both bulbs will be very dim. Another way to test this is to get a multimeter and set the meter to the resistance setting. If you get any value other than zero, then it is functioning as a resistor.
What can you substitute a logarithmic potmeter with?
I would simply suggest taking a linear potmeter of approx a value 700% higher. Then connect a resistor of the original value +20% (approx) across linear pot middle and either side. This makes it working almost like the original logaritmic potmeter. If you want reverse log or dual log, then just connect the resistor to the other leg from middle, or halve the resistor value and connect both from the middle and to each side. If you are unsure how it works, then a spreadsheet provides you with abilities to simulate how it will work. Example of a "Linear Log Pot": A project I started on needed a reverse log taper of 10 K. This was nowhere to be found and I thought, lets cheat. I started with spreadsheet and put in a few formulas for parallell connection of resistors. I found that a 68K linear and a 12K resistor in parallell would give much the same performance curve as a logaritmic taper. It gives approx the same resistance and approx the same voltage (if used as a voltage divider) as a Log and reverse log taper.
Is Light dependent resistor an example of resistor?
yes, a variable resistor
What is the difference between active and passive component?
Active means devices that perform functions in a non linear fashion [amplifiers] passive are components that perform according to a set of linear rules
