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An unknown resistance R1 ​ is connecte...

An unknown resistance R1 ​ is connected in series with a resistance of 10 ohm. This combination is connected to one gap of a metre bridge, while other gap is connected to another resistance R2 ​ . The balance point is at 50 cm. Now, when the 10 ohm resistance is removed, the balance point shifts to 40 cm.Then, the value of R1 ​ is

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Step by step text solution for An unknown resistance R1 ​ is connected in series with a resistance of 10 ohm. This combination is connected to one gap of a metre bridge, while other gap is connected to another resistance R2 ​ . The balance point is at 50 cm. Now, when the 10 ohm resistance is removed, the balance point shifts to 40 cm.Then, the value of R1 ​ is by PHYSICS experts to help you in doubts & scoring excellent marks in Class 12 exams.

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When a resistance of 10Omega is connected in series with the unknown resistance R the balancing length is found to be 50cm . When 10 Omega is removed the balancing length is shifted to 40 cm. What will be the value of unknown resistance R?

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Knowledge Check

  • An unknown resistance R_(1) is connected in series with a resistance of 10 ohm. This combination is connected to one gap of a metre bridge, while other gap is connected to another resistance The balance point is at 50 cm. Now, when the 10 ohm resistance is removed, the balance point shifts to 40 cm. Then, the value of R_(1) is:

    A
    `60 Omega`
    B
    `40 Omega`
    C
    `20 Omega`
    D
    `10 Omega`

  • Two resistances are connected in two gaps of slide wire bridge. The balance point is at 40 cm from left end. A resistance X is connected in series with smaller resistance R and balance point shifts to 40 cm from right end. What is the value of X if R is 4 Omega ?

    A
    `4 Omega`
    B
    `5 Omega`
    C
    `6 Omega`
    D
    `7 Omega`

  • Resistance of 12 Omega and X Omega are connected in parallel in the left gap and resistances of 9 Omega and 7 Omega are connected in series in the right gap of the meter bridge. If the balancing length is 36 cm, then the value of resistance X is

    A
    `72 Omega`
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    In an electrical circuit resistances can be connected in series or parallel or combination of both.If R_1 and R_2 are two resistors connected in series what is their effective resistance.

    A battery of emf E and internal resistance r is connected to a resistor of resistance r_(1) and Q joules of heat is produced in a certain time t. When the same battery is connected to another resistor of resistance r_2 , the same quantity of heat is produced in the same time t, the value of r is:

    A battery of emf E and internal resistance r is connected to a resistor of resistance r_(1) and Q joules of heat is produced in a certain time t. When the same battery is connected to another resistor of resistance r_(2) , thes ame quantity of heat is produced in the same time t, the value of r is

    Resistors P and Q are connected in the gaps of the meter bridge. The balancing point is obtained (1)/(3) m from the zero end. If a 6Omega resistance is connected in series with P the balance point shifts to (2)/(3) m from the same end. P and Q are :

    A cell in open circuit is balanced across 800 cm along potentiometer wire. When the cell is shunted by 3 Omega resistance, the balance points shifts by 200 cm. Calculate internal resistance of the cell.

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