Home
Class 12
PHYSICS
(a) State the working principle of a pot...

(a) State the working principle of a potentiometer with the help of a circuit diagram.
(b) Explain how the internal resistance of a cell is determined. (c ) How do the following affect the potentiometer circuit when (i) the internal resistance of the driver cell increases, (ii) the series resistor connected to the driver cell is reduced ? Justify your answer.

Text Solution

Verified by Experts

( c) (i) If internal resistance of the driver cell increases then current I flowing through potentiometer wire and hence potential gradient decreases. (ii) If series resistor connected to the driver cell is reduced, the current I flowing through potentiometer wire as well as potential gradient across the potentiometer wire increase.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    U-LIKE SERIES|Exercise SELF ASSESSMENT TEST (SECTION A (MULTIPLE CHOICE QUESTIONS))|6 Videos

  • CURRENT ELECTRICITY

    U-LIKE SERIES|Exercise SELF ASSESSMENT TEST (SECTION A (FILL IN THE BLANKS))|2 Videos

  • CURRENT ELECTRICITY

    U-LIKE SERIES|Exercise LONG ANSWER QUESTIONS - I|47 Videos

  • CBSE SAMPLE QUESTION PAPER 2019-20 (SOLVED)

    U-LIKE SERIES|Exercise SECTION D|6 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    U-LIKE SERIES|Exercise SELF ASSESSMENT TEST SECTION-C (VERY SHORT ANSWER QUESTIONS)|3 Videos

Similar Questions

Explore conceptually related problems

State the principle of potentiometer. With the help of circuit diagram, describe a method to find the internal resistance of a primary cell.

State the working principle of a potentiometer. With the help of the circuit diagram explain how a potentiometer is used to compare the emfs of two primary cells. Obtain the required expression used for comparing the emfs.

Knowledge Check

  • Correct diagram for the determination of internal resistance of a primary cell by potentiometer

    A
    B
    C
    D
    None of the above

    • Similar Questions

    Explore conceptually related problems

    Write the principle of working of a potentiometer. Describe briefly, with the help of a circuit diagram, how a potentiometer is used to determine the internal resistance of a cell.

    Describe with the help of a neat circuit diagram how you will determine the internal resistance of a cell using a potentiometer. Derive the necessary formula.

    What is potentiomter ? What is its principle ? How will you find the internal resistance of a cell by a potentiometer?

    (a) State the working principle of a potentiometer. With the help of the circuit diagram, explain how a potentiometer is used to compare the emfs of two primary cells. Obtain the required expression used for comparing the emfs. (b) Write two possible causes for one sided deflection in a potentiometer experiment.

    State the working principle of potentiometer. With the help of the circuit diagram, explain how a potentiometer is used to compare the emf's of two primay cells. Obtain the required expression used for comparing the emfs. Write two possible causes for one sided deflection in a potentiometer experiment.

    State the principle of potentiometer. Draw a circuit diagram used to compare the emfs of two primary cells. Write the formula used. How can the sensitivity of a potentiometer be increased.

    In a potentiometer experiment the balancing length with a cell is 560 cm. When an external resistance of 10Omega is connected in parallel to the cell, the balancing length changes by 60 cm. Find the internal resistance of the cell.

    Home
    Profile