Resistance is measured in ohms.
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.
A variable resistor means that the resistance can be varied, usually by using a slide. A fixed resistor can not be varied.
To limit the current
Hi, where there is no need of changing the value of resistor then why do you place variable resistor instead a fixed resistor. After all the selection of resistor depends on the cause of use in application. by the way wide range of resistor values are avilable in the market. if the application requires tuning operation then variable resistor is need to be mounted. nothing is mandatory unless the application requires. Regards, Manjunath A.V
A stepped resistor, also known as a variable resistor or rheostat, allows for adjustable resistance levels, enabling fine-tuning of current flow in a circuit. In contrast, a fixed resistor has a constant resistance value and does not change. While stepped resistors can be used for applications requiring variable resistance, fixed resistors are typically used in applications where a specific resistance is needed. The ability to adjust resistance in stepped resistors offers greater flexibility in circuit design.
its the colour of the fixed and the variable we define it by its power and name
No, resistors are measured in ohms, not amps. Ohms represent the resistance offered by the resistor to the flow of current, whereas amps (amperes) represent the measure of current flowing through a circuit.
symbols of fixed resistors
Variable resistors means that a resistor which can change its resistance by control by any person or it self and fixed resistor means that it can not change its value.
if not disconnected you will measure the resistance of the circuit in parallel with the resistor.
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.
A variable resistor means that the resistance can be varied, usually by using a slide. A fixed resistor can not be varied.
To limit the current
those are the fixed resistor...u can't change their values..
The voltage across the resistor at the instant in the circuit where Vab is measured is equal to the potential difference between points A and B.
zero
by using voltmeter