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12th Class Physics Current Electricity, Charging & Discharging Of Capacitors / वर्तमान बिजली, चार्ज और कैपेसिटर का निर Question Bank Assertion And Reason (MCQs) - Current Electricity

  • question_answer
    Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: Assertion (A): Potentiometer is used only to compare potential differences. Reason (R): The potentiometer draws current from the voltage source being measured.

    A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)        

    B) Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

    C) Assertion (A) is true but Reason (R) is false             

    D) Assertion (A) is false and Reason (R) is also false

    Correct Answer: D

    Solution :

    (d) Potentiometer is a device used to compare potential differences. Since the method involves a condition of no current flow, the device can be used to measure potential difference, internal resistance of a cell and compare emf's of two sources. Potentiometer draws no current from the voltage source being measured.


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