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insens350 [35]
2 years ago
15

HELP PLEASE I REALLY NEED THE ANSWERS​

Physics
1 answer:
Paul [167]2 years ago
8 0

\star\:{\underline{\underline{\sf{\purple{ \: Question \: 19\: }}}}}

{\large{\textsf{\textbf{\underline{\underline{Given \: :}}}}}}

☆ Number of resistors = 5

☆ Resistance of each resistors = \tt \dfrac{1}{5} \text{\O}mega

{\large{\textsf{\textbf{\underline{\underline{To \: Find \: :}}}}}}

☆ Maximum resistance which can be made.

{\large{\textsf{\textbf{\underline{\underline{Solution \: :}}}}}}

• To get maximum resistance, connect the all the given resistances in series.

For,

<u>Series combination :- </u>

\longrightarrow  \sf  R_{s} = R_{1} + R_{2} + R_{3} + R_{4} + R_{5}

\longrightarrow  \sf   R_{s}= \dfrac{1}{5}  +  \dfrac{1}{5}  +  \dfrac{1}{5}  +  \dfrac{1}{5}  +  \dfrac{1}{5}

\longrightarrow  \sf  R_{s} = \dfrac{1 + 1 + 1 + 1 + 1}{5}

\longrightarrow  \sf R_{s}  = \cancel{ \dfrac{5}{5}  }

\longrightarrow  \sf R_{s}  =  \purple{1  \: \text{\O}mega}

\therefore <u>Maximum resistance is </u>1 Ω.

\star\:{\underline{\underline{\sf{\red{ \: Question \: 20\: }}}}}

{\large{\textsf{\textbf{\underline{\underline{Given \: :}}}}}}

☆ Number of resistors = 5

☆ Resistance of each resistors = \tt \dfrac{1}{5} \text{\O}mega

{\large{\textsf{\textbf{\underline{\underline{To \: Find \: :}}}}}}

☆ Minimum resistance which can be made.

{\large{\textsf{\textbf{\underline{\underline{Solution \: :}}}}}}

• To get minimum resistance, connect the all the given resistances in parallels.

For,

<u>Parallel combination :- </u>

\longrightarrow \sf \dfrac{1}{R_{p}}=\dfrac{1}{R_1}+\dfrac{1}{R_2}+\dfrac{1}{R_3}+\dfrac{1}{R_4}+\dfrac{1}{R_5}

\longrightarrow \sf\dfrac{1}{R_{p}}= \dfrac{1}{ \frac{1}{5} }  + \dfrac{1}{ \frac{1}{5} }  + \dfrac{1}{ \frac{1}{5} }  + \dfrac{1}{ \frac{1}{5} }  + \dfrac{1}{ \frac{1}{5} }

\longrightarrow \sf\dfrac{1}{R_{p}}= 1 \times  \dfrac{5}{1}   +1 \times  \dfrac{5}{1}   +1 \times  \dfrac{5}{1} + 1 \times  \dfrac{5}{1} + 1 \times  \dfrac{5}{1}

\longrightarrow \sf\dfrac{1}{R_{p}}=  \dfrac{5}{1}   +  \dfrac{5}{1}   +   \dfrac{5}{1} +  \dfrac{5}{1} +   \dfrac{5}{1}

\longrightarrow \sf\dfrac{1}{R_{p}}=  25

\longrightarrow \sf R_{p}=   \red{ \dfrac{1}{25}  \: \text{\O}mega}

\therefore <u>Minimum resistance is</u> \dfrac{1}{25} Ω.

{\large{\textsf{\textbf{\underline{\underline{Note \: :}}}}}}

☆ Figure in attachment.

{\underline{\rule{290pt}{2pt}}}

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