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Standard XII

Physics

Potentiometer

The potentiom...

Question

The potentiometer wire $10 m$ long and $20 o h m$ resistance is connected to a $3 v o l t$ emf battery and a $10 o h m$ resistance. The value of potential gradient in $v o l t / m$ of the wire will be

1.0

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Solution

The correct option is A $0.2$
Total Voltage dropped in potential wire = $E (\frac{R}{R + r}) = 3 (\frac{20}{20 + 10}) = 2 V$
Potential Gradient = $\frac{P o t e n t i a l D r o p}{L e n g t h} = \frac{2}{10} = 0.2 v o l t / m$

Therefore, B is correct option.

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Similar questions

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The potentiometer wire 10 m long and 20 ohm resistance is connected to a 3 volt emf battery and a 10 ohm resistance. The value of potential gradient in volt/m of the wire will be

The correct option is A 0.2Total Voltage dropped in potential wire = E(RR+r)=3(2020+10)=2VPotential Gradient = PotentialDropLength=210=0.2volt/mTherefore, B is correct option.

The potentiometer wire $10 m$ long and $20 o h m$ resistance is connected to a $3 v o l t$ emf battery and a $10 o h m$ resistance. The value of potential gradient in $v o l t / m$ of the wire will be

The correct option is A $0.2$
Total Voltage dropped in potential wire = $E (\frac{R}{R + r}) = 3 (\frac{20}{20 + 10}) = 2 V$
Potential Gradient = $\frac{P o t e n t i a l D r o p}{L e n g t h} = \frac{2}{10} = 0.2 v o l t / m$

Therefore, B is correct option.