Question

which combination have low resistance? ​

Answer 1

Answer:

Series combination have low resistance.

Answer 2

Answer:

• >> In parallel combination the resistance is low. It is because in series combination resistance will add directly. But in case of parallel resistance the reciprocal of resistance is added that's makes it resistance low or less.

• >> The resultant resistance of parallel combination of resistances is always less than the minimum resistance present in the combination.

• >> By connecting resistors in parallel, the resistance of the circuit can be decreased.

Hence, The parallel combination have low resistance.

More to know :

✮ What is Resistance ?

Resistance refer to the property of materials that allow the flow of electric current. Resistance certainly opposes the flow of current. Furthermore, the unit of resistance is ohms which is represented by the Greek uppercase letter omega Ω.

✮ Formula for Resistance ?

Resistance = voltage drop across a resistor/ current flowing through a resistor

• R = $\sf \dfrac{V}{I}$

• R = resistance (Ohms, Ω)

• V = voltage difference which is between the two ends of a resistor (Volts, V)

• I = the current which flows through a resistor (Amperes, A)

✮ Formula to find resistance in a series circuit ?

${\large {\boxed{\sf {\red{Series \: Circuit}}}}}$

The total resistance of the circuit is found by simply adding up the resistance values of the individual resistors: equivalent resistance of resistors in series :

• R = R1 + R2 + R3 + ...

✮ Formula to find resistance in a parallel circuit ?

${\large {\boxed{\sf {\red{Parallel \: Circuit}}}}}$

You can find total resistance in a Parallel circuit with the following formula:

• 1/Rt = 1/R1 + 1/R2 + 1/R3 +..

Note :-

$\bullet \: \:$ If one of the parallel paths is broken, current will continue to flow in all the other paths.

$\bullet \: \:$ The total resistance of a parallel circuit is NOT equal to the sum of the resistors (like in a series circuit).