What is the resultant resistance if two resistors of each 2 Ω resistance are connected in parallel?

Question

Question

This question was previously asked in

RRB JE Previous Paper 1 (Held On: 22 May 2019 Shift 2)

Answer 1

CONCEPT:

Resistances in parallel combination: When the terminals of two or more resistances are connected at the same two points and the potential difference across them is equal is called resistances in parallel.
- A parallel circuit is a circuit in which the resistors are arranged with their heads connected together, and their tails connected together.

The net resistance/equivalent resistance(R) of resistances in parallel is given by:

CALCULATION:

Given that: R₁ = R₂ = 2 Ω

So Resultant resistance (R) = 1 Ω

The resultant resistance if two 2 Ω resistors are connected in parallel is 1 Ω. So option 2 is correct.

EXTRA POINTS:

Resistances in series combination: When two or more resistances are connected one after another such that the same current flows through them are called as resistances in series.

The net resistance/equivalent resistance (R) of resistances in series is given by:

Equivalent resistance, R = R1 + R2