Why do we need combinations of resistances (or resistors) in electrical circuits?
Why do we need combinations of resistances (or resistors) in electrical circuits?
Concept Used: Combination of Resistances:
Step 1: Uses of combination resistances:
In practical electrical circuits, we generally need to control current and voltage (potential difference). Different components in an electrical appliance often need different voltages and currents. To obtain the required values of the currents and voltages in any electrical circuit, a certain combination of resistances is used.
Step 2: Ways for Combination of resistances that can be used in a circuit:
The need of using a combination of resistances is to obtain a desired value of current in an electrical circuit, it can be done in two ways, they are
i) series combination, ii) parallel combination.
Step 3: Equivalent Resistance:
Equivalent resistance: If a single resistance can replace the combination of resistances in such a manner that the current in the circuit remains unchanged, then that single resistance is called the equivalent resistance
Concept Used: Combination of Resistances:
Step 1: Uses of combination resistances:
In practical electrical circuits, we generally need to control current and voltage (potential difference). Different components in an electrical appliance often need different voltages and currents. To obtain the required values of the currents and voltages in any electrical circuit, a certain combination of resistances is used.
Step 2: Ways for Combination of resistances that can be used in a circuit:
The need of using a combination of resistances is to obtain a desired value of current in an electrical circuit, it can be done in two ways, they are
i) series combination, ii) parallel combination.
Step 3: Equivalent Resistance:
Equivalent resistance: If a single resistance can replace the combination of resistances in such a manner that the current in the circuit remains unchanged, then that single resistance is called the equivalent resistance
