In a meter bridge $$30$$Ω resistance is connected in the left gap and a pair of $$resistance20$$Ω and Q $$in(Ohm)$$ are in right gap and they are connected in series, then the balancing length is $$50$$ cm . When they were connected in parallel ,the balancing length will be

Question

In a meter bridge $$30$$Ω      resistance is connected in the  left gap and a pair of $$resistance20$$Ω     and Q  $$in(Ohm)$$ are in right gap  and they are connected in series, then the balancing length is $$50$$ cm     . When they were connected in parallel ,the balancing  length will be

Infinity Learn · Accepted Answer

Balancing length $$l=50$$ cm       Resistance $$R=30$$ Ω     Balancing condition for meter bridge $$RS=l100$$−l     $$20$$ Ω      and Q     are in right gap (S)      and they are  connected in series⇒$$3020+Q=5050$$          $$Q=10$$Ω     $$20$$ Ω      and Q     are connected in $$parallel30(20+Q)20Q=l1100$$−$$l1$$     $$30$$×$$30200=l1100$$−$$l1$$     ⇒$$92=l1100$$−$$l1$$     $$900=11l1$$          $$l1=90011$$     ∴  $$l1=81.81$$ cm

In a meter bridge $30 Ω$ resistance is connected in the left gap and a pair of resistance $20 Ω$ and Q in(Ohm) are in right gap and they are connected in series, then the balancing length is $50 c m$ . When they were connected in parallel ,the balancing length will be

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In a meter bridge 30Ω resistance is connected in the left gap and a pair of resistance20Ω and Q in(Ohm) are in right gap and they are connected in series, then the balancing length is 50 cm . When they were connected in parallel ,the balancing length will be

Remember concepts with our Masterclasses.

Ready to Test Your Skills?

free study material

In a meter bridge $30 Ω$ resistance is connected in the left gap and a pair of resistance $20 Ω$ and Q in(Ohm) are in right gap and they are connected in series, then the balancing length is $50 c m$ . When they were connected in parallel ,the balancing length will be