Question

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Answer 1

Explanation:

The net resistance is 1/R=1/2+1/4

1/R=2+1/4

Therefore R=4/3 ohms

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Answer 2

Question :

Calculate the equivalent resistance between two points A and B in the given figure .

Theory :

• Resistors in series and parallel

1) Resistors in series :

For n resistors connected in series

the equivalent Resistance $R_{eq}$ is given by :

$R_{eq}=R_{1}+R_{2}+R_{3}+...+R_{4}$

2) Resistors in parallel:

For n resistors connected in parallel

the equivalent Resistance $R_{eq}$ is given by :

$\dfrac{1}{R_{eq}} = \dfrac{1}{R_{1} } + \dfrac{1}{R_{2} } + \dfrac{1}{R_{3} } + ...... \dfrac{1}{R_{n} }$

Solution :

${\purple{\boxed{\large{\bold{R_{eq}=\frac{4ohm}{3}}}}}}$

Refer to the attachment:

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More About Combination of resistors :

1) In series combination : The current through each resistor is same .

2) In parallel combination : the potential difference is same across each resistor.