Question

find the equivalent resistance of this circuit. ​

Answer 1

Answer:

The voltage across each resistor in parallel is the same. The total resistance of a set of resistors in parallel is found by adding up the reciprocals of the resistance values, and then taking the reciprocal of the total: equivalent resistance of resistors in parallel: 1 / R = 1 / R1 + 1 / R2 + 1 / R3 +......

Explanation:

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Answer 2

Answer:

When key k is open

I is equal to 12/8 or 4/3 ampere

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when key k is not open

I is equal to 12/4 ampere i.e. 3 A

this is by the V=IR formula

also series resistance is added whie parallel resistance is taken reciprocally and added then again inverted

e.g. 2 &4 r parallel

1/2+1/4= 3/4. so R = 4/3

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