Question

R1 and R2  are two resistances connected to an electric cell in parallel then resultant resistance of the combination is equal to
A) R1 + R2
B) R1.R2 / R1 + R2
C) R1 + R2 / 2
D) 2R1.R2 / R1 + R2​

Answer 1

when the resistances are connected to parallel connection then the resultant resistance is

1 = 1 + 1

R R1 R2

So,

1 = R1 + R2

R R1.R2

R = R1.R2

R1+R2

option B)

Hope it helped.........................

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Answer 2

$\red{ \boxed{ \mathbb{ \huge\star \: ANSWER}}}$

$\blue{ \mathtt{when \: two \: resistance \: is \: connected \: in \: parallel \: then}} \\ \pink{ \mathtt{ \frac{1}{rp = (( \frac{1}{r {1} }) + ( \frac{1}{r2} )) } }} \\ \orange{ \mathtt{ which \: is \: also \: written \: as }} \\ \blue{ \mathtt{rp = \frac{(r1 \times r2)}{(r1 + r2)} }} \\ \purple{ \mathtt{ Hence, \: option \: (b) \: is \: correct.}} \\ \blue{ \mathtt{ HOPE \: IT \: CLEAR! </p><p></p><p> }} \\ \blue{ \mathtt{PLEASE \: MARK \: THIS \: ANSWER \: BRIALLIANT \: ANSWER!! }}$